Off-Road Beast: The Incredible Transformation of a Military Jeep M715

An Ex-Military Truck M715 Turned Bitchin’ Desert Bomber

Retired military-based vehicles have long been popular among off-road enthusiasts when it comes to building a rugged, dirt-worthy machine. From Humvees to 6x6s, go to any major off-road area on a busy weekend, and you’re apt to see at least one or two that’s been converted for civilian adventure use. But just like with any subcategory of the automotive world, there are a handful of ex-military vehicles you hardly ever see “in the wild,” or at least not built out like a prerunner ready to take on the Mexican desert. One such vehicle is the classic 1967 Kaiser Jeep M715 tactical military truck. When one is built in such fashion, man, it makes for one heck of a ride!

This gorgeous M715 is owned by Wade Geisler, owner of Straightedge Automotive Restoration in St. Anthony, Idaho. Now, if you know anything about St. Anthony, you probably know that it’s home to some of the most visited sand dunes in the country for off-roaders and adventure campers, outside of Glamis, California. As such, this M715 fits in well, having been built to bomb through the sand and silt of Baja California. Also fitting? Its name—Baja Kaiser.

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Military Beginnings

Based on the civilian Jeep Gladiator, the Kaiser Jeep M715 was originally produced starting in 1967 as a light, 1 ¼-ton military truck.

It was designed as a tactical troop and cargo carrier, but built with the use of mostly commercially available components as opposed to components made specifically for the production of military vehicles (like many of its predecessors and successors).

Other variants of the model included the M725 and M726, which were built for ambulatory and maintenance/utility work, respectively.

While the M715 was used in combat by the United States during the Vietnam War, the truck was considered subpar compared to its predecessor, the Dodge M37. Power, reliability and rigidity were all known downfalls of the truck as a military vehicle.

Therefore, the M715 model was completely replaced, at least in US military outfits, by the mid 1970s.

“While known to be underpowered with a sluggish 230ci inline-6 under the hood, the M715 made for a great base-model truck for anyone looking for a relatively cheap utility vehicle, albeit not being known for its strong platform.”

Once retired from military service, many M715s became available for civilian use. While known to be underpowered with a sluggish 230ci inline-6 under the hood, the M715 made for a great base-model truck for anyone looking for a relatively cheap utility vehicle, albeit not being known for its strong platform. Therefore, it wasn’t uncommon to see a discharged M715 variant on the streets in the 1970s and ’80s.

Unfortunately, fewer and fewer of the models can be found nowadays. While some continue to be fortunate enough to find owners willing to give them a new lease on life, countless others can be found rotting away in some farmer’s field.

Though a sad ending to some, it makes those relics that were saved that much cooler—especially when built like this one!

The Story Behind the “Tornado” Engine

Of course, no tale of the Kaiser Jeep M715’s lineage would be complete without tipping our hat to one of its more notable engineering quirks: the “Tornado” engine.

Developed for Jeep’s civilian J-series Gladiator pickups and the iconic Wagoneer, the Tornado was a 230-cubic inch inline-six with a few tricks up its sleeve for the early 1960s.

Unlike most engines of its day, this six-banger boasted an overhead camshaft—pretty cutting-edge tech for the era—along with a cast-iron block but lightweight aluminum pieces for bits like the intake manifold and valve cover.

Kaiser rolled it out in 1963, aiming to bring modern performance to Willys and Kaiser-branded trucks and wagons.

Did it deliver? Well, in a sense, yes and no.

The Tornado’s design looked great on paper, but putting it into production a tad too early meant it still had a few kinks to work out. Reliability gremlins aside, it helped cement Kaiser’s reputation for thinking outside the box, being the only Kaiser-designed engine ever to power a Jeep model.

Though its run only lasted a handful of years—ending in 1965—its legacy lives on as a bold, if imperfect, step forward for Jeep’s workhorses.

Shifting Gears: The Military Jeep’s Succession

As the M715 and its siblings found new civilian lives, the broader Jeep lineup was also undergoing significant changes within the military ranks. The tried-and-true Willys Jeeps—those classic workhorses like the M38 and M38A1—were gradually phased out from U.S. Military service during the early 1960s.

Their unique blend of simplicity and off-road capability had served dutifully, but evolving needs and technology meant it was time for a successor.

In came the Ford-designed M151 MUTT (Military Utility Tactical Truck). Unlike the boxy Jeeps of yesteryear, the M151 brought a sleeker design, independent suspension, and improved handling—advancements much needed for the changing landscape of military operations.

Multiple contracts kept assembly lines humming, with tens of thousands rolling out to serve the armed forces, effectively filling the utility gap left by the departing classic Jeeps.

These transitions not only marked the end of an era but also paved the way for new generations of off-road legends—each with its own quirks, reputation, and a dedicated following among both veterans and vehicle enthusiasts alike.

Off-Road Ready

Wanting to get the most out of his M715, Wade made a point to outfit the Kaiser with beefy, off-road worthy components, starting with the chassis.

While the Kaiser maintains its original frame, it was rebuilt and beefed up in-house at Straightedge. The truck was then equipped with Eibach springs both front and rear, as well as FOX coilover shocks with bypasses.

This setup gave the Kaiser an incredible 17 inches of suspension travel in the front and 22 inches of travel in the rear!

Now, there’s no way you’re going to get the most out of a suspension system like that with a classic 3.8L I6 under the hood.

So Wade did the only thing he could—outfit his truck with a Chevrolet Performance supercharged 6.2L LSA marine V-8. Now if that isn’t enough to get your juices running, we don’t know what is!

Backing the LSA engine is a 4L80e automatic transmission built for an RV, which pushes the engine’s supercharged power through an Atlas transfer case to DynaTrac ProRock 80 front and rear drive axles before making contact with the ground by way of 4 ½-inch backspaced Toyo Open Country A/T III tires wrapped around TrailReady 844 Stealth wheels. Additionally, both the front and rear of the truck feature 4.56 gears and locking differentials for even more off-road readiness.

Looking the Part

Wade outfitted his ex-military truck with some pretty substantial performance upgrades, but it should look cool too, right? Well, Wade and his team at Straightedge Automotive Restoration didn’t disappoint there either!

“So Wade did the only thing he could—outfit his truck with a Chevrolet Performance supercharged 6.2L LSA marine V-8. Now if that isn’t enough to get your juices running, we don’t know what is!”

While the team wanted to maintain the classic look of the truck, they opted to upgrade it accordingly based on plans to bomb through the Mexican desert more than once.

These upgrades include custom bumpers and a custom long-travel bed cage, which showcases the FOX bypasses prominently.

The truck was also upgraded with 5 ¾-inch 40W headlights from ORACLE Lighting, as well as one of the company’s underglow kits, and rear-facing Rough Country LED cube lights for added visibility in any situation.

The painted finish of the truck is a Military Tan chip guard laid by Matt Hollist, and topped off with black classic military-inspired graphics.

Inside the truck is equally equipped featuring black cloth Corbeau USA racing seats, a Grant 689 racing steering wheel atop an Ididit steering column, and Classic Instruments Moal Bomber Series gauges.

Since The Baja Kaiser was built for high-speed desert driving, the interior of the truck also boasts a custom roll cage built by the team at Straightedge, a Rough Country switch control panel, and a Rugged Radios communication system.

Other niceties you’ll find in the truck include a WOLFBOX rear camera, and an air conditioning system from Vintage Airto help combat that desert heat as well as make driving around Idaho that much more comfortable.

Wade’s Kaiser Jeep M715 is such a cool and unique rig that we challenge you to find one just like it. Built to take on the Mexican desert like a boss, this ex-military vehicle is miles away from its 3.8L-powered, tactical beginnings, but as they say, with age comes wisdom, and there’s certainly plenty of genius in this build.

UPGRADES:

1967 Kaiser Jeep M715 “Baja Kaiser”

OWNER:

Wade Geisler
St. Anthony, ID

Chassis & Suspension:

Rebuilt and reinforced 1967 Kaiser 715 frame
Eibach Off-Road front and rear springs
FOX front and rear coilover shocks with bypasses
PSC Motorsports steering box and stabilizer
Custom fuel tank

Wheels & Tires:

17×8-inch TrailReady 844 Stealth wheels
Toyo Open Country A/T III tires with 4.5-inch backspacing front and rear

Engine & Drivetrain:

2010 Chevrolet Performance supercharged 6.2L LSA marine V8
Custom motor mounts
3-inch Novak Conversions headers
Custom 3-inch exhaust system
2010 RV 4L80e automatic transmission
Transmission work done by Western Transmission of Idaho Falls, ID
TCI Automotive 63005BL shifter
Custom crossmember
Atlas transfer case
DynaTrac ProRock 80 front and rear drive axles
4.56 gears front and rear
Front and rear lockers
2008 Duramax brake booster and master cylinder

Body & Paint:

ORACLE Lighting 5 ¾-inch 40W headlights
Rough Country LED rear cube lights
ORACLE Lighting underglow kit
Custom bumpers built by Straightedge Auto Restoration
Custom long-travel rear bed cage
Military Tan chip guard with military-inspired graphics by Matt Hollist

Interior & Sound:

Black cloth Corbeau USA racing seats
Custom roll cage built by Straightedge Auto Restoration
Classic Instruments Moal Bomber Series gauges
Grant 689 racing steering wheel
Ididit steering column
Rough Country switch control panel
WOLFBOX rear camera
Rugged Radios communication systemVintage Air A/C

FREQUENTLY ASKED QUESTIONS

What are the considerations for buying accessories or modifications for an M715?

Considerations for Buying Accessories or Modifications for an M715

Purchasing accessories or modifications for an M715 can be a rewarding but challenging undertaking. Here are key factors to keep in mind:

Availability of Parts: Locating engine parts for the M715 may be difficult. However, many other accessories are still accessible if you search diligently and with patience.
DIY Upgrades: If you possess the skills, consider installing accessories yourself. This not only saves money but also allows you to customize the truck to your exact specifications.
Compatibility and Functionality: Before making a purchase, ensure that the accessories or modifications are compatible with the M715. Research each item to understand how it will enhance or alter your vehicle’s performance and aesthetics.
Quality and Durability: Investing in high-quality aftermarket accessories—such as those from reputable brands—ensures that your modifications will withstand both time and use.
Cost and Budgeting: Setting a budget is essential. Factor in the initial cost of accessories along with potential installation expenses, especially if professional assistance might be necessary.
Market Research and Reviews: Read reviews from other M715 enthusiasts and do thorough market research. This will guide you in choosing accessories that others have found useful and reliable.

By considering these aspects, you can make informed decisions to effectively enhance and personalize your M715.

What should be checked in the M715’s transmission, transfer case, axles, suspension, brakes, and steering system?

When inspecting an M715, it’s crucial to assess several components to ensure you’re making a sound purchase. Here’s a comprehensive guide on what to check in the transmission, transfer case, axles, suspension, brakes, and steering system:

Transmission & Transfer Case

Oil Leaks: Check underneath the vehicle for any signs of oil leaks from the transmission and transfer case. A few drops are typical, but significant leaks may signal serious issues.
Gear Shifts: Test drive the truck to ensure smooth gear transitions. Difficulty in shifting or unusual noises may suggest transmission problems.

Axles

Leak Inspection: Similar to the transmission, inspect for oil leaks around the axles, ensuring the gaskets and seals are intact.
Noise: Listen for any loud noises, such as grinding or clunking, which could indicate worn out gears or bearings.

Suspension

Physical Check: Examine the suspension components for signs of wear or damage, including the leaf springs, shocks, and bushings.
Riding Comfort: While driving, pay attention to how the vehicle handles bumps and uneven surfaces. A rough ride may indicate suspension issues.

Brakes

Pedal Response: Press the brake pedal to ensure it doesn’t go too close to the floor before engaging. A soft or spongy pedal can signal air in the brake lines or worn brake shoes.
Brake Drums: If you suspect wear, pull the brake drums to check for scoring or extreme wear, which might require replacement.

Steering System

Excessive Play: Check for excessive play in the steering wheel. This could point to problems with tie rods, the drag link, or the steering box.
Wheel Alignment: Inspect the front tires for uneven wear, which may suggest misalignment or other underlying issues in the steering system.
Bearings and Bushings: Jack up the front wheels and test for loose wheel bearings and worn steering-knuckle bushings by shaking the wheels.

Additional Checks

Wheel Bearings: Ensure there are no loose wheel bearings as indicated by unusual noises or steering instability.
Alignment Clues: Cupping on tires typically indicates alignment problems, so check if front and rear tires show consistent wear patterns.

These checks will help identify potential issues in these critical components, ensuring that the M715’s mechanical systems are in good working order before purchase.

Clutch & Brake Inspection Tips

When examining the clutch, make sure there’s the appropriate amount of free play at the pedal—typically about an inch to an inch and a half before resistance is felt. Depress the clutch and listen for any abnormal noises, such as growling or squeaking, which could point to a worn or failing release bearing.

For the brakes, the ideal pedal should not sink more than halfway toward the floorboard before the brakes engage. If the pedal feels spongy or requires repeated pumping before it firms up, this might mean the brake shoes are out of adjustment or potentially worn out. Should you notice diminished braking power—or if there’s any reason to doubt the shoes’ condition—remove the brake drums and inspect for excessive wear or scoring. Catching worn or damaged brake components early will ensure safe operation and help avoid more costly repairs down the road.

Winch Inspection: Signs of Wear and Oil Leaks

If the M715 you’re considering is equipped with a winch, take a close look for any oil seepage around the winch housing or mounting points. Fresh or accumulated oil suggests worn seals or internal issues, which could mean a costly repair down the road.

Keep in mind that factory winches were not typically installed on U.S. Military ambulance variants, so if you see a winch on such a model, it’s almost certainly an add-on—even if the seller suggests otherwise. Don’t let “all-original” claims mislead you.

To assess heavy use, inspect the winch drum and cable for noticeable wear, kinks, or fraying. Excessively scarred, rusted, or deeply scratched surfaces are prime indicators of regular and demanding use—think more logging road rescues than gentle weekend outings. A well-cared-for winch should function smoothly and look relatively clean, while one that’s been through countless extractions will often show its battle scars.

Check the mounting hardware and surrounding bumper for signs of stress, bending, or repairs. These can reveal if the winch has been pushed beyond light-duty work. A winch that looks as haggard as a coffee-stained workshop manual is usually a sign the entire truck has seen its fair share of adventure—or misadventure.

How can one assess the overall condition and potential defects of an M715 during a test drive?

Assessing the M715: A Test Drive Guide

When evaluating the overall condition of an M715, especially during a test drive, there are several key areas to focus on to identify potential defects:

Engine and Transmission Performance

Power Assessment: Despite its reputation, the M715 should exhibit adequate power for its vintage. While driving, pay attention to any unusual noises such as loud howls or whines from the drive train.
Transmission Check: This vehicle features a four-speed transmission that should operate quietly and shift smoothly in its three upper gears. It should never jump out of gear during acceleration or deceleration; if it does, this signals significant issues.

Drive Train and Handling

Noise and Vibration: On the road, rumbling or noticeable vibrations might indicate issues like loose universal joints, misaligned or bent drive shafts, or problems with the transfer case.
Front-End Stability: At speeds of 45 to 50 mph, there should be no front-end shimmy. Pay attention to ensure the vehicle does not vibrate excessively.

Braking System

Braking Efficiency: Although the brakes are not power-assisted like modern vehicles, they should still be effective, bringing the vehicle to a smooth stop without pulling to one side.
Brake Examination: Listen for metallic scraping sounds, which could indicate severely worn brake shoes. If a wheel consistently locks or squeals, it might suggest oil contamination from a leaking wheel bearing seal.

Rust Inspection

Rust Hotspots: Inspect for rust in critical areas, including:
- The inside of the rear bumper.
- The floor of the cargo bed.
- Cab corners and floor pan.
- Rocker panels and around the brake master cylinder on the firewall.

By focusing on these aspects during a test drive, you can gain a comprehensive understanding of the M715’s condition and identify any potential defects early on.

Door Window Seals and Tracks

To evaluate the condition of the door window seals and tracks, start by rolling the windows up and down, checking for any sticking, rattling, or excessive resistance. Properly functioning windows should move smoothly and stay firmly in place when closed. Inspect the rubber seals around the window edges for cracks, splits, or signs of brittleness—worn or perished seals can lead to water leaks and wind noise. Additionally, examine the tracks for accumulated dirt, rust, or visible damage. Well-maintained seals and tracks not only help keep the elements out but also contribute to quieter, more comfortable driving.

Is the M715 a good truck for newcomers to the military vehicle hobby?

When considering the M715 as a starting point for newcomers to the military vehicle hobby, it’s important to weigh its strengths and drawbacks. This vehicle, originally designed for tactical military use, holds a certain appeal for enthusiasts due to its rugged design and historical significance.

Advantages:

Rugged Build: The M715 is renowned for its robust construction, making it a durable option for off-road adventures.
Historical Value: Owning an M715 can be rewarding for those interested in vintage military vehicles and their unique roles in history.

However, newcomers should be aware of some challenges:

Maintenance Needs: The M715 may require significant tuning and repairs. Many have found success in restoring these vehicles, often swapping out engines and components for more modern equivalents.
Parts Availability: While parts for this model are accessible through many aftermarket suppliers, sourcing them can require patience and research.

Overall, the M715 can be a great introduction for enthusiasts willing to invest time in learning about and maintaining their vehicle. Its potential as a noteworthy project and conversation piece shouldn’t be underestimated, especially if one is prepared to navigate its quirks.

Why was the M715 nicknamed the “five-quarter” truck?

The M715 truck earned the nickname “five-quarter” due to its 1 1/4-ton payload capacity. This designation highlights its ability to carry a load that is a quarter-ton more than a standard 1-ton truck. The M715 was not the only model in its lineup; it was accompanied by the M725 ambulance, the M724 contact maintenance truck, and the M726 telephone maintenance truck, each designed for specific roles. Among these, the M726 was the rarest, making the M715’s “five-quarter” moniker a distinguishing feature in the series.

What should be inspected for rust and wear in an M715?

When inspecting an M715 for rust and wear, it’s crucial to conduct a thorough examination of several key areas. Start with the rear bumper, focusing especially on the inside, as this is a common spot for rust to accumulate.

Next, turn your attention to the bed’s floor. Check thoroughly for any signs of rust, as this area is particularly vulnerable due to its exposure to the elements.

Don’t overlook the cab corners, floor pan, and rocker panels; these structural components are notorious for rusting over time. Checking these areas ensures the integrity of the vehicle is intact.

Furthermore, inspect where the brake master cylinder attaches to the firewall, both inside and out, to identify any rust that might affect braking performance.

By carefully examining these areas, you ensure that the M715 maintains its structural soundness and reliability.

What signs should be looked for to detect oil leaks and brake problems in an M715?

Detecting Oil Leaks in an M715

To identify potential oil leaks in an M715, begin by examining the vehicle when it’s warmed up and idling. Focus on:

Engine: Look for any significant oil puddles forming beneath.
Transmission, Transfer Case, and Axles: Inspect for leaks, but be aware that a few drips can be normal given the truck’s age.

While you’re under the vehicle, inspect the drive shafts and universal joints for any looseness, as this could indicate future maintenance needs.

Spotting Brake Problems

Investigating brake issues involves a bit of detective work:

Check the Interior: Lift seats and sift through compartments, especially in places like the glove box.
Brake Fluid Cans: Finding multiple cans of brake fluid could suggest persistent brake issues.
Receipts and Documentation: Look for old receipts in the glove box. These documents can substantiate claims of recent repairs or installations of new/rebuilt parts.

By thoroughly inspecting these areas, you can gain valuable insights into the overall health of the M715 and address any underlying issues.

How important is it to verify the paperwork and history of an M715 before purchase?

When considering the purchase of an M715, verifying its paperwork and history is crucial. Here’s why:

Clear Ownership: Ensuring that the seller has the legal right to sell the vehicle is your first step in safeguarding your investment. A clean title is essential to prove ownership and to prevent any legal issues down the road.
Outstanding Tickets: It’s wise to check for any unpaid tickets associated with the vehicle. Unpaid fines can lead to unwanted hassles, such as booting or towing if parked illegally, and they might also affect your ability to register the vehicle.
Avoid DMV Surprises: By acquiring a comprehensive vehicle history, you can avoid unexpected issues during the registration process. Discovering substantial unpaid fines or unresolved legal claims at the DMV is an unpleasant surprise that could complicate ownership transfer.
Fraud Prevention: Verifying documents helps shield you from fraud. Confirm that all VIN numbers match across documents and the vehicle itself to ensure you’re not purchasing a stolen or otherwise suspicious vehicle.
Seller Collaboration: If any doubts arise about the vehicle’s history or liens, it’s prudent to have the seller accompany you to the DMV for title transfer. This not only provides peace of mind but also ensures transparency during the transaction.

Taking these steps to confirm the documentation and historical background of an M715 is vital in ensuring a smooth and secure purchase. You’ll save yourself from potential legal headaches and financial pitfalls, making your investment more sound and enjoyable.

How did the M715 perform during its service in Vietnam?

While the M715 was used in combat by the United States during the Vietnam War, the truck was considered subpar compared to its predecessor, the Dodge M37. Power, reliability, and rigidity were all known downfalls of the truck as a military vehicle. Therefore, the M715 model was completely replaced, at least in US military outfits, by the mid-1970s.

Despite having an engine rated at 54 more horsepower than the M37, the M715 often felt underpowered due to its higher cargo capacity, which led to frequent overloading. This overload contributed to its reputation for being fragile, particularly because the engine was known to be troublesome and quirky, mirroring its performance in civilian service.

Additionally, the M715’s cab was lightly built, even when compared to other civilian trucks. This resulted in door hinges and latches that did not endure well under tactical use. The suspension system, although heavily reinforced to handle a 1 1/4 ton cargo rating, caused the truck to ride roughly when empty. On uneven terrain, the stiffness of the springs often led to situations where the truck would twist, causing wheels to lose contact with the ground and sometimes making the doors impossible to open—a serious drawback in combat scenarios.

These operational challenges highlighted the M715’s shortcomings and ultimately influenced its replacement in military service.

How did the design and production of the M715 reflect cost considerations for the military?

Based on the civilian Jeep Gladiator, the Kaiser Jeep M715 was originally produced starting in 1967 as a light, 1 ¼-ton military truck. It was designed as a tactical troop and cargo carrier, but built with the use of mostly commercially available components as opposed to components made specifically for the production of military vehicles (like many of its predecessors and successors).

In 1965, Kaiser Jeep embarked on the development of the M715 to replace the aging M37 model. This decision marked a significant shift towards cost-efficiency. The military opted for a design built using off-the-shelf civilian parts, a practice not seen since before World War II. This approach not only streamlined production but also significantly reduced costs.

To put it into perspective, the initial contract purchase price for the M715 was $4,400 per unit. This was approximately half the cost of what a new M37 would have required, thereby offering substantial savings. Such financial prudence was undoubtedly welcomed by the General Accounting Office, underscoring the military’s strategic emphasis on budget-conscious innovation during this period.

What are the main issues associated with the M715’s engine?

While known to be underpowered with a sluggish 230ci inline-6 under the hood, the M715 made for a great base-model truck for anyone looking for a relatively cheap utility vehicle, albeit not being known for its strong platform.

However, this engine wasn’t just about lacking power; it was fraught with several mechanical issues that hindered its reliability:

Vapor-Lock and Percolation: In hot environments, the engine often suffered from vapor-lock and percolation when shut off, making it difficult to restart. These issues were particularly troublesome in steamy jungles or sultry plains.
Running-On and Flooding: The engine had a tendency to ‘run-on,’ also known as dieseling, and could easily flood during startup attempts. These were undesirable features for any truck, especially in demanding conditions.
Mechanical Flaws: The engine’s long timing chain was a major fault. It relied on a crude rubbing block instead of a more advanced tensioning system, leading to a loose, noisy chain and sloppy valve timing. This caused the chain to sometimes rub against and unscrew timing cover bolts.
Durability Issues: The camshaft was relatively soft, wearing down quickly and affecting valve lash settings, which resulted in a noisy clatter. Frequent adjustments were needed due to this wear and the use of rocker arms directly on the camshaft.
Aluminum Component Vulnerability: Unlike more conventional engines with robust cast-iron and steel components, the M715’s aluminum parts like the intake manifold and valve cover couldn’t withstand the rigorous maintenance practices of motor-pool mechanics.

Despite these challenges, with a more durable design, the M715’s engine might have seen greater success and longevity. The potential was there if only the execution had matched the ambition.

How did the design of the M715 incorporate elements from the civilian Gladiator pickup?

The M715’s design ingeniously borrowed from its civilian counterpart, incorporating several components while adapting others for military use. The front sheet-metal, cab body tub, and doors were directly lifted from the Gladiator, providing the foundation for its sturdy build. However, to accommodate the military 9.00X16 tires, the front fenders were modified with large cut-outs, a necessary adaptation for its rugged military duties.

Lighting and Protection: The Gladiator’s grille was removed, leaving the radiator exposed, but this vulnerability was mitigated with the addition of a tubular front brush guard. Military-specific lamps replaced the Gladiator’s ornamental trim plates, with inboard parking and blackout markers mounted strategically for functional use.

Interior Modifications: Inside, the civilian dashboard was swapped for a flat military model to fit M-series instruments, aligning closely with the M37’s setup. The windshield, a flat, fold-down design, was similar to that of a Jeep, but with non-openable glass, contributing to significant heat retention in the cabin.

Seating and Functional Upgrades: The standard bench seat was replaced with durable military bucket seats flanking a center-mounted battery box. This box evolved from a slanted prototype to a more practical flat-topped design, optimizing space for additional storage.

These thoughtful integrations and modifications illustrate how the M715 successfully transitioned from a civilian vehicle to a robust military workhorse, embodying both practicality and adaptability.

What issues were associated with the M715’s Kaiser Tornado engine?

“While known to be underpowered with a sluggish 230ci inline-6 under the hood, the M715 made for a great base-model truck for anyone looking for a relatively cheap utility vehicle, albeit not being known for its strong platform.”

Despite the engine’s rating of 132 horsepower at 4000 rpm, the M715 struggled to deliver the expected performance when compared to its predecessor, the Dodge M37. This was particularly puzzling since the M37 had a significantly lower horsepower rating of 78 hp at 3200 rpm. The similar final drive ratios between the vehicles failed to translate the M715’s theoretical power advantage into real-world performance.

Several factors contributed to the perception of the M715 as underpowered:

Transmission and Gear Ratios: Equipped with a four-speed manual transmission and two-speed transfer case, the M715’s setup did little to enhance the driving experience or effectively utilize the engine’s capabilities.
Brake and Steering Systems: Like the M37, the M715 featured non-boosted hydraulic drum brakes and manual steering, which might have amplified the feeling of sluggishness and difficulty in handling.
Design and Weight Considerations: The M715 incorporated components from the civilian J Series Gladiatorpickup, including body parts and tires, which might have impacted its weight and aerodynamics, further hindering performance.

In summary, while the M715 presented a modern appearance and offered certain advantages such as a higher cargo capacity, its engine and overall mechanical configuration contributed to its reputation as an underperforming utility vehicle.

How was the M715 developed by Kaiser Jeep, and what civilian components were used?

In fact, this approach marked a significant change in military vehicle development. The M715 was one of the first U.S. Military tactical trucks to incorporate mostly off-the-shelf civilian parts since before WWII. This not only sped up production but also brought about cost savings. With an initial contract purchase price of $4,400 per unit, the M715 was a more economical choice, costing about half of what a new M37 would have cost at the time.

Other variants of the model included the M725 and M726, which were built for ambulatory and maintenance/utility work, respectively. These variants shared the same philosophy of leveraging civilian technology, making the M715 series versatile and cost-effective solutions for military needs.

What were the different models of the M715 series, and what purposes did they serve?

Other variants of the model included the M725 and M726, which were built for ambulatory and maintenance/utility work, respectively.

The M715 series featured four primary models, each designed for specific military purposes:

M-715: This standard 1 1/4 ton cargo truck came with a canvas top for both the cab and cargo bed. It also featured troop seats and racks, reminiscent of the M37, with small stowage compartments on each side of the cargo bed. An optional front-mounted 8,000 lb. PTO winch added utility for heavy-duty tasks.
M-724: Known as the cab and chassis model, it was typically outfitted with a contact maintenance body. This version included essential tools like a welder and generator, making it a mobile workshop. Like other models, it often boasted an 8,000 lb. PTO winch at the front.
M-725: Serving as an ambulance, it utilized the M715’s front sheet metal combined with an ambulance body equipped with four stretcher racks. Standard features included a ceiling-mounted surgical light, ventilators, and a gas-fired heater. Its design focused on delivering immediate medical aid, with a roof-mounted spotlight for night operations.
M-726: Tailored for telephone maintenance, this model used the M-715 cab paired with a utility box rear body. Unlike the M-724, it had an open cargo area and a lower silhouette, making it ideal for quick and agile maintenance tasks. It too usually included a front-mounted winch and spotlight.

All M715 models came standard with M-series pioneer tools and jerry cans. Optional accessories, like an arctic insulated hard-cab and heater system or a deep-water fording kit, expanded its operational capabilities across varied environments.

PTO Shear Pins: Small Part, Big Importance

Speaking of parts that often get overlooked, let’s talk about the seemingly humble shear pin found on the winch’s PTO (power take-off) shaft. You might be tempted to swap it out for a regular bolt if it breaks, but here’s why that’s a bad idea: the original shear pin is designed to act as a safety device. It’s intentionally made to break under excessive strain, protecting both the winch and its cable from catastrophic failure.

In simpler terms, that pin is a mechanical “fuse.” If your winch gets snarled or overloaded—maybe you’re yanking a buddy’s rig out of a patch of that infamous St. Anthony sand—the shear pin will snap before anything more expensive or hard-to-replace (like the winch gears, cable, or even the PTO itself) bites the dust. Swapping it for a hardened bolt, on the other hand, defeats this built-in safety net and can lead to seriously expensive repairs. So, for the health and longevity of your vintage Kaiser (or any classic off-roader with PTO winching), stick to real shear pins. Your winch, and your wallet, will thank you.

What modifications were made to the civilian J-series Gladiator pickup to create the M715?

To adapt the civilian J-series Gladiator pickup into the M715, several modifications were made:

Front Sheet-Metal and Body Tub: The front sheet-metal, cab body tub, and doors were directly lifted from the civilian model. This integration maintained the robust design needed for military use.
Front Fenders: These were modified with large cut-outs. This change was essential to fit the military 9.00×16 tires, ensuring the vehicle could handle rugged terrain.
Grille and Lighting: The original Gladiator grille was removed. In its place, cast-aluminum M-series parking and blackout marker lamps were mounted inboard of the headlights. Interestingly, the Gladiator trucks had two round ornamental trim plates that perfectly accommodated these military lamps, a fitting coincidence or perhaps a design foresight.

Other variants of the model included the M725 and M726, which were built for ambulatory and maintenance/utility work, respectively. These adaptations and variants highlight the M715’s versatility and the thoughtful engineering that transformed a civilian vehicle into a military mainstay.

How does the M715’s cab and body design differ from its civilian counterpart?

The design of the M715’s cab and body exhibits several distinctive modifications compared to its civilian counterpart, the J-series Gladiator pickup.

Firstly, while the front sheet metal, cab body tub, and doors originate from the Gladiator pickup, notable changes were made for military purposes. One key alteration involves the front fenders, which were modified with large cut-outs. These adjustments allowed the accommodation of substantial 9.00×16 military tires, a feature not found in the civilian version.

In addition to the fender modifications, the Gladiator’s original grille was removed entirely. Instead, the design incorporated cast-aluminum fixtures for parking and blackout marker lamps, positioning them inside the headlights. What’s interesting is that the civilian Gladiator trucks had two round ornamental trim plates in these spots, which conveniently matched the size required for the military lamps. This change not only served a practical function but also seamlessly integrated with the existing design elements of the vehicle.

Overall, these modifications highlight the M715’s adaptation from its civilian model to meet military specifications and requirements.

How does the M715’s dashboard and interior differ from the civilian model?

When transitioning from a civilian vehicle to the M715, several key modifications were made to suit military needs. These changes are particularly evident in the dashboard and interior layout, designed for function and durability rather than civilian comfort.

Dashboard Transformation

Streamlined for Military Instruments: The civilian Gladiator’s original dashboard was overhauled to fit a flat military version. This new layout was customized to hold the standardized M-series instruments and switches, resembling the setup found in the M37 model.
Instrument Cluster: Keeping with military specifications, the instrument cluster maintained simplicity and utility, mirroring almost identical features to those in military trucks.

Interior Adjustments

Windshield Design: A distinct change involved the windshield, which is a flat, vertical, fold-down design similar to traditional Jeeps. While it incorporates one-piece glass, unlike its predecessor, it does not open. This feature could increase cabin temperature during hot weather or when the roof canvas is applied.
Door and Window Modifications: The standard civilian door glass was swapped out for a fixed window frame that includes a non-openable ‘wing window.’ This alteration also contributed to increased interior heat.
Seating Arrangement: Inside, the conventional bench seat was substituted with two canvas-covered military bucket seats. These are positioned on either side of a center-mounted battery box, prioritizing utility over comfort. It’s worth noting that the initial design of the battery box had a slanted top, later revised to a flat surface in subsequent versions.

These adaptations highlight the M715’s evolution to meet rigorous military requirements, resulting in a vehicle focused on robustness and practicality over passenger conveniences.

How can you verify the history and paperwork of an M715 before purchasing?

Ensure a Smooth Purchase of an M715: Verify History and Paperwork

When considering the purchase of an M715, taking a few precautionary steps can prevent potential headaches down the road. Here’s how you can verify the vehicle’s history and paperwork:

Confirm Ownership

Clear Title Check: First, confirm that the seller possesses a clear title to the M715. This proves they have the legal authority to sell the vehicle and that there are no liens or claims against it.
Accompany the Seller: If feasible, have the seller join you at the Department of Motor Vehicles (DMV) for the title transfer. This can smooth out any discrepancies and encourage honesty.

Investigate Outstanding Issues

Unpaid Tickets: Verify that the vehicle does not have any outstanding parking or traffic tickets. Unresolved fines can lead to additional expenses or even impounding.
Check for Towing Issues: Research if the vehicle has any history that could make it susceptible to towing or booting. You can typically find this information on your local municipal website or by contacting relevant authorities.

Utilize Vehicle History Services

Vehicle History Reports: Employ third-party services like Carfax or AutoCheck. These services provide comprehensive reports that detail past accidents, title issues, and more.
VIN Verification: Use the vehicle identification number (VIN) to access databases that track a vehicle’s history. This step ensures transparency about the vehicle’s past and current status.

Final Tips

Paperwork Thoroughness: Ensure all necessary paperwork is complete and accurate before the transaction. This includes the bill of sale, title documents, and any pertinent maintenance records.
Inspection: Consider hiring a mechanic to inspect the vehicle. They can identify potential mechanical issues that might not be apparent during a cursory inspection.

By following these guidelines, you can confidently purchase your M715, safe in the knowledge that it’s free from undisclosed issues.

What should you look for in the M715’s steering system during an inspection?

Examine in the M715’s Steering System During an Inspection

When inspecting the steering system of an M715, there are several critical aspects to consider:

Excessive Play: Begin by checking for excessive play in the steering. This involves examining whether the looseness originates from the tie rods, drag link, or steering box. Identifying the source of the play will help you gauge the potential repair work required.
Front Wheel Check: Safely jack up the front wheels to examine their stability. You should shake the wheels to detect any signs of loose wheel bearings or worn-out steering-knuckle bushings.
Tire Condition: Inspect the front tires for signs of cupping or irregular wear. This often indicates alignment issues or problems with the steering knuckle or wheel bearings.
Rear Tire Examination: If you notice the rear tires are cupped but the front ones aren’t, this could be a red flag. It often suggests that the tires were switched to mask alignment issues.

Through these steps, you can ensure a thorough assessment of the M715’s steering system during your inspection.

How can you detect potential braking system issues in an M715?

Detecting potential braking system issues in an M715 involves a few careful observations and checks. Start by paying attention to the brake pedal’s response. When you apply the brakes, ensure that the pedal doesn’t sink more than halfway to the floor before you feel resistance. If it does, this could indicate a problem that requires attention.

Immediate Checks

Pedal Responsiveness: If the brake pedal can only engage the brakes after multiple pumps, this may be a sign that the brake shoes need to be adjusted or are possibly worn out.
Brake Shoe Inspection: If you suspect the brake shoes are worn, it’s prudent to remove the drums and inspect them. Look for signs of scoring on the drums, which can further confirm the wear.

By systematically checking these aspects, you can better identify potential issues in your M715’s braking system before they escalate.

What should you check for regarding the M715’s cooling system and water pump?

Key Considerations for Inspecting the M715’s Cooling System and Water Pump

When examining the M715’s cooling system and water pump, several critical aspects demand your attention to ensure proper functioning and avoid costly repairs down the line.

Inspect Engine Oil Quality

Cleanliness: Ensure the engine oil appears clean and isn’t excessively dark or dirty.
Additives: Watch out for signs that excessive additives like STP or heavy gear oil have been used to mask underlying issues.

Check for Water and Oil Mix

Oil Condition: Be alert for milky or greenish oil, as this can indicate a water leak from a head gasket or a cracked engine block.
Radiator Check: With the engine running, inspect for oil or bubbles in the radiator, which are tell-tale signs of a leak in a cylinder.

Evaluate the Water Pump

Bearing Condition: Gently shake the fan while the engine is off to detect any play, signaling loose water pump bearings.
Pump Availability: Be mindful that the type of water pump might be rare and difficult to replace, especially for certain models.

Examine Belts and Hoses

Fan Belt: Look at the condition of the fan belt to ensure there’s no excessive wear or fraying.
Radiator Hoses: Check hoses for any signs of cracks, leaks, or degradation.

Look for Signs of Corrosion and Leaks

Rust Inspection: Inspect the engine block for rusted or leaking soft plugs.
Radiator Leaks: Check the radiator for any obvious leaks or corrosion. If you notice significant water loss from the overflow pipe, it might suggest a stuck thermostat or rust blockages.

By meticulously examining these components, you’ll gain a comprehensive understanding of the cooling system’s health and nip potential issues in the bud, saving time and resources in your vehicle maintenance journey.

What are the signs of a worn timing chain in the M715’s engine?

Signs of a Worn Timing Chain in the M715 Engine

Identifying a worn timing chain in an M715 engine can save you from more significant issues down the road. Here’s what to listen for and observe:

Rattling Noises: A loose timing chain often creates rattling sounds. These are usually more noticeable when the engine revs upward through the RPM range. If you hear persistent noise when accelerating, it could be a worn timing chain.
Engine Misfires or Poor Performance: A deteriorating timing chain can disrupt proper engine timing, leading to misfires or a noticeable dip in performance. If your vehicle is not running as smoothly as it should, the timing chain might be the culprit.
Difficulty Starting: If your engine struggles to start or takes longer than usual to turn over, this could be another sign of timing chain issues. A misaligned chain can make it difficult for the engine to ignite properly.
Oil Pressure Warning: Though less specific, changes in oil pressure can sometimes signal timing chain problems. While normal oil pressure should be around 40-45 psi when driving and 10-15 psi at idle, significant fluctuations could be worthy of attention.
Check Engine Light: Modern engines may trigger a check engine light if the timing chain is worn. Always check for error codes that could point you to a timing chain issue.

By keeping an ear out and an eye on engine behavior, you can identify a worn timing chain before it leads to more severe engine damage.

How can you identify oil burning or piston ring issues in an M715’s engine?

Identify Oil Burning or Piston Ring Issues in an M715’s Engine

Recognizing signs of oil burning or piston ring problems in your M715’s engine is crucial for maintaining its performance and longevity. Here’s what you should look out for:

Observe the Exhaust Smoke:
- Pay attention to the color of the exhaust smoke. A blue tint is a telltale sign of oil burning, often linked to worn-out piston rings or valve stem seal issues.
Inspect the Spark Plugs:
- Remove and check the spark plugs for oil residue. Oily spark plugs often suggest that oil is seeping into the combustion chamber, indicating potential wear in the piston rings or valve seals.
Monitor Engine Performance:
- Notice any drop in engine power or efficiency. This can be a symptom of compromised piston rings, which can prevent the engine from maintaining optimal compression levels.

By keeping an eye on these indicators, you can catch potential issues early, ensuring your M715 remains in top-notch condition. Regular maintenance and inspections are key to preventing significant engine damage.

What is the significance of engine oil pressure in an M715?

Understanding Engine Oil Pressure in an M715

Engine oil pressure is a fundamental aspect of your M715’s performance and longevity. It serves several critical roles, ensuring your engine runs smoothly and efficiently.

Why Engine Oil Pressure Matters

Lubrication:
- Engine oil pressure keeps vital engine parts well-lubricated.
- Proper lubrication prevents excess friction, reducing wear and tear.
Cooling:
- Adequate oil pressure helps dissipate heat generated by engine components.
- It aids in maintaining optimal engine temperature, safeguarding against overheating.
Efficiency and Performance:
- Consistent oil pressure is crucial for maintaining engine efficiency.
- It ensures that your vehicle performs at its best, avoiding loss of power.

What to Expect from Your M715’s Engine Oil Pressure

When driving, expect a reading around 40-45 psi.
At idle, the oil pressure should hover between 10-15 psi.

These readings indicate that your engine is well-oiled and functioning properly.

Monitoring and Troubleshooting

It’s not uncommon for M-Series electric gauges to provide imprecise readings. If there’s any doubt about the accuracy of your oil pressure readings, it’s wise to verify with a reliable mechanical gauge. This step can prevent potential engine damage by catching issues early.

In summary, maintaining the correct oil pressure is vital for the health of your M715’s engine, ensuring it continues to run efficiently and reliably. Regular monitoring and timely checks can save on costly repairs in the long run.

How did the Gladiator and Wagoneer influence the design of the M715?

The design of the M715 was significantly influenced by components from the civilian Gladiator pickup, with specific elements being adapted for its military use.

Key Design Influences

Body and Structure:
- The front sheet-metal, cab body tub, and doors of the M715 were directly taken from the Gladiator. These components maintained the rugged and utilitarian character needed for military applications.
- Modifications were made to the front fenders, allowing for the installation of larger 9.00X16 military tires, which were essential for navigating rough terrains.
Wheel and Tire Configuration:
- Although the M715 shared tire size with the M37, the wheel design was distinct, which necessitated modifications for towing compatibility, specifically the need for extra spare tires when using the M101 trailer.
Front and Grille Modifications:
- The Gladiator’s original grille was removed, exposing the radiator but a tubular brush guard was added for essential protection.
- Military-spec M-series lamps were fitted where the Gladiator had ornamental trim, showcasing an ingenious adaptation of existing design elements.
Lighting Adjustments:
- The civilian model’s lights beneath the headlights were omitted and covered, aligning with military requirements for blackout conditions.
Interior and Dashboard:
- The Gladiator’s dashboard was swapped for a military-style flat dashboard, integrating standard military instruments similar to those found in the M37.
- The windshield was redesigned to be a flat, fold-down feature like that of a Jeep but did not open, affecting cabin ventilation.
Seating and Interior Climate:
- The civilian bench seat was replaced with two military bucket seats with canvas covers, positioned around a central battery box. This change supported practical military needs but also contributed to increased heat inside the truck due to limited ventilation.

Overall, the Gladiator influenced the M715’s design by providing a robust foundation, which was then adapted for military specifications, particularly in terms of durability, functionality, and standard military equipment integration.

How did the M715 series trucks accommodate military needs with their body designs?

The M715 series trucks were crafted with a purely military design in mind, which was evident in their practical functionality and appearance. The cargo truck’s rear bodies were tailored to meet military specifications, ensuring they could accommodate various operational needs effectively. Despite their modern look, these trucks retained a rugged charm that was well-suited for military purposes.

Other variants of the model included the M725 and M726, which were built for ambulatory and maintenance/utility work, respectively. The design of these variants also reflected a focus on specialized military applications, highlighting the adaptability of the M715 series to different roles.

Overall, the M715 series trucks struck a balance between using civilian components and fulfilling military design requirements, ensuring they were both practical and visually appealing for military use.

Is the M715 a good truck for purchase and restoration?

Despite its shortcomings, the M715 had potential as a tactical military truck. During its brief production run from 1967 to 1969, it served its purpose adequately, but the lack of improvements left some issues unresolved. Enthusiasts believe that, with more time in service, the M715 could have evolved into a robust military vehicle.

For restorers, this means an opportunity to address those “bugs” and enhance the truck’s capabilities. The historical context of the M715 adds an extra layer of appeal; its short-lived production and subsequent replacement by early commercial utility vehicles make it a unique piece of automotive history.

In considering the M715 for purchase and restoration, it’s essential to weigh these factors. While it may not have been perfect, its availability and potential for improvement make it an intriguing project for those with the right skills and vision.

What are some characteristics of the M715’s design and construction?

The M715’s design incorporated several notable features that distinguished it from other military vehicles. It had a four-speed manual transmission and a two-speed transfer case, complemented by non-boosted hydraulic drum brakes, ensuring a rugged yet straightforward mechanical structure. The parking brake was ingeniously integrated to act upon a drum at the rear of the transfer case, similar to its predecessor, the M37.

The truck’s body was lifted from the civilian J Series Gladiator pickup, with modifications such as large cut-outs in the front fenders to accommodate military-sized tires. The vehicle’s interior was adapted for military use, replacing the civilian dashboard with a flat military model and swapping out the standard bench seat for two canvas-covered military bucket seats to flank a center-mounted battery box.

One of the practical adjustments made to the M715 post-production involved reversing the installation of front lifting shackles to prevent bumper damage—an example of real-world adaptability. The vehicle also featured a tubular front brush guard, offering some protection to the radiator, which was left exposed due to the removal of the Gladiator’s grille.

Additionally, the M715 was equipped with specialized military features like cast-aluminum parking and blackout marker lamps, strategically mounted to replace the civilian ornamental trim plates. The blackout driving lamp, essential for night operations, was positioned on the front left corner of the hood, underscoring its tactical design considerations.

Overall, the M715 was a blend of civilian and military engineering, reflecting a unique era of vehicle design tailored for the demands of tactical operations.

How does the M715 compare to its predecessor, the Dodge M37?

In 1965, the M715 was designed to replace the M37 and was one of the first U.S. Military tactical trucks built mostly with off-the-shelf civilian components. This cost-effective approach led to a purchase price of $4,400 per unit, which was half the cost of a new M37.

Despite the M715’s engine being rated at 132 horsepower at 4000 rpm—significantly higher than the M37’s 78 hp at 3200 rpm—it often felt underpowered in comparison. This was due to similar final drive ratios, which failed to translate the higher horsepower into noticeably improved performance.

The M715’s technical specifications included a four-speed manual transmission and a two-speed transfer case, along with non-boosted hydraulic drum brakes. It also featured manual steering and a parking brake that acted upon a drum at the rear of the transfer case. These features did not mark a significant advance over the M37, except for a higher rated cargo capacity and a more modern appearance.

Ultimately, while the M715 had the potential for greater power on paper, its real-world application revealed several shortcomings, leaving it often unfavorably compared to the M37.

What were some of the improvements and shortcomings of the M715 compared to previous models?

“While the M715 was used in combat by the United States during the Vietnam War. The truck was considered subpar compared to its predecessor, the Dodge M37. Power, reliability, and rigidity were all known downfalls of the truck as a military vehicle. Therefore, the M715 model was completely replaced, at least in US military outfits, by the mid-1970s.”

Despite its service in combat, the M715 often fell short in performance compared to the M37. Power was a significant issue, as the M715 seemed underpowered despite having similar final drive ratios to the M37.

Features and Shortcomings

Transmission and Brakes: The M715 was equipped with a four-speed manual transmission and a two-speed transfer case. However, it featured non-boosted hydraulic drum brakes, which could be seen as a disadvantage in terms of stopping power and safety.
Steering and Parking Brake: Like the M37, it had manual steering and a parking brake that acted on a drum at the rear of the transfer case. These features did not offer any improvements over its predecessor.
Construction: Virtually all M715s were built on the same frame, regardless of body style or the addition of a winch, limiting versatility.

Improvements

Cargo Capacity and Appearance: The M715 did boast a higher-rated cargo capacity, which was one of its few advantages. Additionally, its modern look was a step forward aesthetically, even if not functionally.

When the M715 did differ from the M37, it was often in negative ways, reinforcing the decision to replace it entirely by the mid-1970s.