The M35 2½-ton cargo truck is a long-lived 2½-ton 6×6 cargo truck initially used by the

United States Army The United States Army (USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution.Article II, section 2, ...

and subsequently utilized by many nations around the world. Over time it evolved into a family of specialized vehicles. It inherited the nickname "Deuce and a Half" from an older 2½-ton truck, the World War II

GMC CCKW GMC may refer to: Government India * Gandhinagar Municipal Corporation, in Gujarat * Gobichettipalayam Municipal Corporation, in Tamil Nadu * Guntur Municipal Corporation, in Andhra Pradesh * Guwahati Municipal Corporation, in Assam * Gwalior ...

. The M35 started as a 1949

REO Motor Car Company The REO Motor Car Company was a company based in Lansing, Michigan, which produced automobiles and trucks from 1905 to 1975. At one point, the company also manufactured buses on its truck platforms. Ransom E. Olds was an entrepreneur who founde ...

design for a 2½-ton 6×6 off-road truck. This original 6-wheel M34 version with a single wheel tandem was quickly superseded by the 10-wheel M35 design with a dual tandem. The basic M35 cargo truck is rated to carry off-road or on roads. Trucks in this weight class are considered medium duty by the military and the Department of Transportation.

Specifications

Dimensions

An M35A2 cargo truck with a PTO-driven Garwood front winch is tall, wide and long, and empty ( empty when equipped with the front mount winch, according to dashboard dataplates). The standard wheelbase cargo bed is 8 feet wide by 12 feet long (2.4 × 3.6 m), with only 7.25 feet of this width being flat floorspace between the stake-pockets, the tailgate rising 16 inches above the floor and the side-walls/stake-pockets rising 12 inches above the floor. The M35A2 was available with a canvas soft top or a metal hard top. Metal hard-top configurations are most often found on vehicles that have been equipped with cold-weather gear, including additional insulation in the cab, as well as engine coolant or multifuel-fired cab personnel heaters. The curb weight of an M35 is between and empty, depending on configuration (cargo, wrecker, tractor, etc.). Its top speed is , though maximum cruising speed is approximately . Fuel economy is highway and city, giving the vehicle a 400–500-mile (600–800 km) range on its single fuel tank. Most operators experience an average of for an unladen vehicle. The 6-wheel M34 had a single-wheel tandem and used 11:00×20 size tires, which required a wheel well in the cargo bed, while the 10-wheel M35 had a dual-wheel tandem and used smaller 9:00×20 tires, which did not require a wheel well.

Drivetrain

The M35A2 is commonly powered by an LDT 465 engine, made by either

Continental Motors Company Continental Motors Company was an American manufacturer of internal combustion engines. The company produced engines as a supplier to many independent manufacturers of automobiles, tractors, trucks, and stationary equipment (such as pumps, gen ...

, Hercules, or

White Motor Company The White Motor Company was an American automobile, truck, bus and agricultural tractor manufacturer from 1900 until 1980. The company also produced bicycles, roller skates, automatic lathes, and sewing machines. Before World War II, the comp ...

. It is an in-line, 478-cubic-inch (7.8 L), six-cylinder,

turbocharged In an internal combustion engine, a turbocharger (often called a turbo) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake gas, forcing more air into the engine in order to pro ...

multifuel engine developing and of

torque In physics and mechanics, torque is the rotational equivalent of linear force. It is also referred to as the moment of force (also abbreviated to moment). It represents the capability of a force to produce change in the rotational motion of t ...

. This is coupled with a 5-speed manual transmission and divorced 2-speed transfer case (either a sprag-operated transfer case Rockwell 136-21 or air-operated selectable transfer case Rockwell 136–27). Multifuel engines are designed to operate reliably on a wide variety of fuels, including diesel fuel, kerosene, heating oil or gasoline. Gasoline may be used only in an emergency because it does not properly lubricate the injector pump. While using gasoline, common practice calls for the addition of at least 1 U.S. quart of clean motor oil per 15 U.S. gallons of gasoline (1 imp qt/13 imp gal; 1 L/60 L) for proper pump lubrication where available. Although the A2 version is the most common, there are four different iterations: Standard, A1, A2, and A3. These changes mainly had to do with the engine and transmission components. Standard M35 had a REO "Gold Comet" or Continental OA331 inline-6 gasoline engine. Some had 4-speed transmissions but most had "direct 5th" transmissions. The gasoline-powered deuces were built primarily by REO Motors, however, Studebaker also had a manufacturing contract from at least 1951 into the early 1960s. Curtis-Wright also had a contract in at least 1958 to build dump trucks with the Continental gas engine. The A1's had Continental LDS-427-2 turbo engines, equipped with either a model 4-450 Schwitzer turbo or a 4D454C Schwitzer turbo on later models, and 5th gear was an overdrive. The 140 hp engines were not reliable, suffering frequent headgasket failures. The first A2 trucks received the bigger LD-465-1 naturally aspirated 478 CID multifuel engines, keeping the OD transmission of the A1s. Through the years the trucks were upgraded to LD 465-1c engines, with 60Amp alternator instead of the 25Amp generator. With the addition of a

turbocharger In an internal combustion engine, a turbocharger (often called a turbo) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake gas, forcing more air into the engine in order to p ...

, the engine evolved into the LDT 465-1c (turbo clean air). The turbo was added more to clean up the black exhaust on the Non Turbo engines, than to add power; the HP was raised from 130 to only 135 HP. Turbo models used: 3LD305 (early engines only) and 3LJ319 (the "whistler") The LDT-465-1D was the last version of the Multi Fuel, it had the same 3LJ319 Turbo (whistler), or the quieter 3LM39 (non-whistler), better head gasket sealing and head cooling.

M35A3

From 1994 until 1999, the M35A3 variant was introduced as part of Extended Service Program. Usually, A3 vehicles have a

Caterpillar Caterpillars ( ) are the larval stage of members of the order Lepidoptera (the insect order comprising butterflies and moths). As with most common names, the application of the word is arbitrary, since the larvae of sawflies (suborder S ...

3116 Diesel engine and had their manual transmissions replaced with Allison 1545 4-speed automatic transmissions, as well as receiving numerous other improvements with a redesigned frontal appearance. No new A3 standard-transmission vehicles were produced, all vehicles being upgraded from previous configurations during the rebuild process. The exception is some M109A3 shop vans. A small number of M109A3s were upgraded to A4 specifications using the M35A3 upgrade parts and procedures. As-built original Pre A2s are gasoline-powered, A1s use the LDS 427-2 multifuel engine, A2s use the LD/LDT 465-1c multifuel engine, and A3s use the Caterpillar diesel. It is common, however, to find rebuilds of former gas-powered REO and Studebaker models having A1 and A2 multifuel configurations. The original contract for the M35 - Service Life Extension Program was competitive. The last two companies to send vehicles to

Aberdeen Proving Ground Aberdeen Proving Ground (APG) (sometimes erroneously called Aberdeen Proving ''Grounds'') is a U.S. Army facility located adjacent to Aberdeen, Harford County, Maryland, United States. More than 7,500 civilians and 5,000 military personnel work ...

were

AM General AM General is an American heavy vehicle and contract automotive manufacturer based in South Bend, Indiana. It is best known for the civilian Hummer and the military Humvee that are assembled in Mishawaka, Indiana. For a relatively brief period, ...

, South Bend, IN and Cummins Military Systems, Augusta, GA (AMG was awarded third quarter of 1993).

Brakes

Brake system is air-assisted-hydraulic six-wheel

drum brake A drum brake is a brake that uses friction caused by a set of shoes or pads that press outward against a rotating cylinder-shaped part called a brake drum. The term ''drum brake'' usually means a brake in which shoes press on the inner surfa ...

s with a driveline parking brake, although gladhands exist on the rear of the vehicle for connection to trailers with full air service and emergency brakes. Braking performance of the truck is similar to other power drum brake vehicles of this size. Each drum was designed with maximum efficiency in mind, and individual drums can dissipate up to of braking heat. Due to this brake system and GVWR under , the M35 can be driven without a commercial driver's license in most states.

Electrical

The electrical system is 24

volt The volt (symbol: V) is the unit of electric potential, electric potential difference ( voltage), and electromotive force in the International System of Units (SI). It is named after the Italian physicist Alessandro Volta (1745–1827). Def ...

, using two 12 volt 6TL-series military grade batteries run in series.

Operational history

The M35 family was introduced in 1950 to replace the

and M135 family cargo trucks that constituted the backbone of U.S. military transport since their introduction in World War II. The M35 would not completely replace the M135 family until the middle of the 1960s. However, the M35 would quickly become the dominant truck in its class in the U.S. military, serving with all the services in various capacities. For a short period the M35 was called "The Eager Beaver" by the U.S. Army due to its fording ability. But the name was never popular and forgotten in a few years. The M35 series was to be replaced by the

Light Medium Tactical Vehicle The Family of Medium Tactical Vehicles (FMTV) is a series of military vehicles that are based on a common chassis and vary by payload and mission requirements. The FMTV is derived from the Austrian Steyr 12M18 truck, but substantially modi ...

. However, many

United States National Guard The National Guard is a state-based military force that becomes part of the reserve components of the United States Army and the United States Air Force when activated for federal missions.Reserve units continued to use them as the new family of vehicles was phased in. The M35 series was used by the United States in

Iraq Iraq,; ku, عێراق, translit=Êraq officially the Republic of Iraq, '; ku, کۆماری عێراق, translit=Komarî Êraq is a country in Western Asia. It is bordered by Turkey to the north, Iran to the east, the Persian Gulf and ...

during

Operation Iraqi Freedom {{Infobox military conflict , conflict = Iraq War {{Nobold, {{lang, ar, حرب العراق (Arabic) {{Nobold, {{lang, ku, شەڕی عێراق ( Kurdish) , partof = the Iraq conflict and the War on terror , image ...

. M35 series vehicles were known to be in use by National Guard units as late as the mid-2000s. In order to replace its 1950s vintage M135 fleet, the Canadian Army adopted licensed versions of the M35 (and M36 variant) built in Canada by Bombardier in 1982. As of 2020, the trucks, designated MLVW (Medium Logistics Vehicle, Wheeled) were still in service although limited spare part supplies forced the fleet managers to cannibalize from selected donors. Canadian vehicles feature a hard cab roof, an adjustable driver's seat, an Allison MT-643 automatic transmission, a

Detroit Diesel Detroit Diesel Corporation (DDC) is an American diesel engine manufacturer headquartered in Detroit, Michigan, United States. It is a subsidiary of Daimler Truck North America, which is itself a wholly owned subsidiary of the mulitinational D ...

engine displacing 500 cubic inches (8.2 L), six wheels instead of ten (using single wheels on the tandem rear axles instead of dual wheels), and an ether-start for winter operations. The original 11.00X20 bias ply tires on split ring wheels were later changed fleet-wide to

Michelin Michelin (; ; full name: ) is a French multinational tyre manufacturing company based in Clermont-Ferrand in the Auvergne-Rhône-Alpes '' région'' of France. It is the second largest tyre manufacturer in the world behind Bridgestone and la ...

radials on bolt-together wheels in 2002 due to safety concerns. Canada had been investigating a replacement under the Medium Support Vehicle System Project, and a

vehicle A vehicle (from la, vehiculum) is a machine that transports people or cargo. Vehicles include wagons, bicycles, motor vehicles (motorcycles, cars, trucks, buses, mobility scooters for disabled people), railed vehicles (trains, trams), wat ...

has been selected. The MLVWs were initially not deployed with Canadian Forces in Afghanistan because of their lack of armor protection. An armor kit was subsequently developed leading to a limited deployment of the vehicles.

Variants

The M34/M35 series of trucks came in wide array of variants and subvariants. As noted engine differences could be noted by the A1, A2, or A3 suffix, but additional suffix letters were also sometimes added. These letters had different meanings depending on what variant to which they were applied. Under the nomenclature system used by the

United States Army Ordnance Corps The United States Army Ordnance Corps, formerly the United States Army Ordnance Department, is a sustainment branch of the United States Army, headquartered at Fort Lee, Virginia. The broad mission of the Ordnance Corps is to supply Army comb ...

Supply Catalog (known as ''G-series'') the M34/M35/M36 family is designated G742.

Cargo

As noted the original basic gasoline-powered truck variants were first the M34, and then the M35. An extra long wheel-base variant, designated the M36, was also developed (featuring a cargo bed). Variants with a C suffix (such as M35A2C or M36A2C) featured a straight drop-side cargo bed. M44, M45, and M46 simply designated the long single tandem, long double tandem, and extra long double tandem chassis for the M35 -ton series of trucks; there was also a short tandem chassis without an M designation. These cab/chassis would serve as the basis for many more specialized variants. In 1982, Bombardier produced a M35 variant for the

Canadian Forces } The Canadian Armed Forces (CAF; french: Forces armées canadiennes, ''FAC'') are the unified military forces of Canada, including sea, land, and air elements referred to as the Royal Canadian Navy, Canadian Army, and Royal Canadian Air Force. ...

' medium logistic vehicle, wheeled platform. This featured an Allison MT-643 automatic transmission, and a Detroit Diesel engine displacing 500 cubic inches (8.2 L). The original 11.00X20 bias ply tires on split ring wheels were later changed fleet-wide to Michelin radials on bolt-together wheels in 2002 due to safety concerns.

Tank truck

530B structural pumper firefighting vehicle

The M49 fuel tanker and M50 water tanker variants were initially based on the M44 chassis. The M49C series, however, were vehicles converted from C series drop-side cargo variants. M49s have 1,200-gallon tanks. Early models had triple compartments (200g front, 400g mid, baffled 600g rear), but most models have two 600-gallon baffled tanks. The M50 had a water tank, of which later variants had internal baffles to combat weight transfer during motion. In some areas the M35 is still used today as a wildland firefighting truck with a portable water supply and fully operational pump.

Van

A number of variants with van bodies, primarily for use as maintenance shop vans, were also created. The basic model was the M109, with a variant that could mount the PTO winch was designated M185. The M185 was a machine shop version of the M109 that carried a light duty crane, tools, other items. It often towed a M105 trailer. An expandable van variant with hydraulic lift gate was designated M292. Two variants of the M109 were specifically developed as service vehicles for the

MGM-18 Lacrosse The MGM-18 Lacrosse was a short-ranged tactical weapon intended for close support of ground troops. Its first flight test was in 1954 and was deployed by the United States Army beginning in 1959, despite being still in the development stage. The ...

missile system, the XM411 for the Ground Guidance Electronic Equipment, and the XM412 with special tools and test equipment for the electronic guidance and control system. A medical van variant was designated M132.

Wrecker and tractor

A wrecker based on the M45 chassis was designated as the M60, while the similar M108 crane truck was used for many tasks, but primarily to handle guided missiles such as the Lacrosse. Two tractor variants for towing semi-trailers were developed, the M48 and M275. The M48 featured a full-length M45 chassis (178 inch wheelbase, identical to the M35 cargo), while the M275 featured a shortened M45 chassis (166 in wheelbase) for reduced weight and greater maneuverability. However, due to the smaller size and lower power of the -ton trucks, most heavier loads were handled by their respective 5-ton counterparts. As a result, few were produced.

Construction

A number of specialized construction variants were developed. The M47 and M59 dump trucks were developed, based on a shortened 166 inch wheelbase M44 and M45 chassis respectively. An improved dump truck based on the full length 178 inch wheelbase M45 chassis, designated the M342, was designed to replace both the M47 and the M59, as well as the M135-based M215. Also under the M45 chassis was the signal corps V-17 pole derrick, and the V-18 auger truck, later replaced by the M35 upgrade below. The M756 was a specialized pipeline repair vehicle, the M763 was designed for telephone line repair, and the M764 was a specialized earth-boring and pole-setting variant.

Gun trucks

The versatility of the pattern was perhaps shown best in its usage as an armored " gun truck" for patrol duties and convoy escort. The simplest examples were produced by simply placing an existing light gun mount directly onto the cargo bed of the truck, and securing it in place. No armouring or special support equipment was installed. One such conversion was performed in Congo-Leopoldville in 1965, using an Oerlikon GAI 20 mm anti-aircraft gun. Another conversion in the Congo entailed mounting pods with 2.75" aircraft rockets on a pedestal on the cargo bed, but this proved unsuccessful. The first more sophisticated conversions of the pattern were performed by the U.S. military in Vietnam. U.S. Army Artillery Battalions (Automatic Weapons, Self-Propelled) were often assigned Artillery Batteries (.50-caliber), units equipped with M35 trucks and M55

Quadmount The M45 Quadmount (nicknamed the "meat chopper" and "Krautmower"Rottman, Gordon L., Browning .50-Caliber Machine Guns', Osprey Publishing (2010), , p. 19-20 for its high rate of fire) was a weapon mounting consisting of four of the "HB", or "hea ...

systems mounting four

M2 Browning machine gun The M2 machine gun or Browning .50 caliber machine gun (informally, "Ma Deuce") is a heavy machine gun that was designed towards the end of World War I by John Browning. Its design is similar to Browning's earlier M1919 Browning machine gun, ...

s. Units were also authorized a single

M60 machine gun The M60, officially the Machine Gun, Caliber 7.62 mm, M60, is a family of American general-purpose machine guns firing 7.62×51mm NATO cartridges from a disintegrating belt of M13 links. There are several types of ammunition approved for ...

and

M79 grenade launcher The M79 grenade launcher is a single-shot, shoulder-fired, break-action grenade launcher that fires a 40×46mm grenade, which uses what the US Army calls the High-Low Propulsion System to keep recoil forces low, and first appeared during the Vi ...

. While the M35 was designed to act as the prime mover for the M55

system, which included a towed trailer, the M45 mount was often removed or the wheels removed from the trailer, and the system mounted on the bed of the truck. The M55 system was also mounted on the M54 truck. More simplified armoring projects were conducted as well, adding armored walls of various thicknesses to standard cargo variants. A smaller bed-mounted multi-angle "box" was also tried. U.S. Army gun trucks used a wide variety of weapons including the

, and even the

M134 Minigun The M134 Minigun is an American 7.62×51mm NATO six-barrel rotary machine gun with a high rate of fire (2,000 to 6,000 rounds per minute). It features a Gatling-style rotating barrel assembly with an external power source, normally an electric ...

. At the end of the Vietnam War most of these vehicles were returned to their standard configuration, except for a single original example shipped to the U.S. Army Transportation Museum at Fort Eustis, Virginia in 1971. Numerous Vietnam veterans have expended countless hours to build full size replicas of their original Gun Trucks, using M35, M54, and even Army Dump Trucks as platforms, much the same as these veterans did in Vietnam. A functional display replica of the "Psychotic Reaction" Gun Truck Based on an M35A2 chassis is currently in use and being displayed at many military vehicle displays and Vietnam veteran reunions / events. The concept lived on well after the Vietnam War. El Salvador converted a number of M35 type vehicles into armored trucks in the 1980s, after successful conversions of Magirus Deutz trucks. These vehicles were nicknamed "Mazingers" in reference to the Japanese cartoon

Mazinger Z is a Japanese super robot manga series written and illustrated by Go Nagai. The first manga version was serialized in Shueisha's '' Weekly Shōnen Jump'' from October 1972 to August 1973, and it later was reissued in Kodansha ''TV Magazi ...

. The Philippine Marine Corps also began converting M35 type trucks to an armored configuration by 2004. The first vehicle, dubbed "Talisman," utilized armor fabricated from derelict LVTP5 amphibious personnel carriers. Later gun trucks were built using more standard components and bear some resemblance to U.S. military vehicles of the Vietnam era. The Philippine Marine Corps had also begun the creation of an anti-aircraft element by 2006, utilizing M35 based vehicles. Two types of vehicles have been seen so far. One utilizes the Mk 56 Mod 0 mount from the

Patrol Boat, River Patrol Boat, Riverine, or PBR, is the United States Navy designation for a small rigid- hulled patrol boat used in the Vietnam War from March 1966 until 1975. They were deployed in a force that grew to 250 boats, the most common craft in the ...

, with two

s, while the other features another former naval mount with a single

Oerlikon 20 mm cannon The Oerlikon 20 mm cannon is a series of autocannons, based on an original German Becker Type M2 20 mm cannon design that appeared very early in World War I. It was widely produced by Oerlikon Contraves and others, with various models emp ...

. Colombia maintains a fleet of REO M35 "Meteoro" armored trucks. These locally fabricated armored vehicles are used to guard tourist bus caravans as well as mobile checkpoints. Early vehicles were not fabricated to any particular standard and typically hosted three weapon stations that could be fitted with a 7.62 mm (.308-cal) or .50-caliber (12.7 mm) machine gun. The weapon stations may or may not have had a gun shield on any particular vehicle. More recent examples follow a pattern with the cab and fuel tanks armored and the drop side cargo bed converted to an armored box, atop which is a "gun tower," a set of four heavily armored weapon stations, one facing each direction. .50-caliber machine guns are mounted front and back, with 7.62 mm machine guns mounted to the sides. Losses in the Meteoro fleet instigated the purchase of the BTR-80 ''Caribe''. In addition to the basic cargo version, tank water and fuel models were used. The CEMABLIN-(Centro de Mantenimiento de Blindados del Ejército Venezolano) locally manufactured a version of anti-air defense operations and support, thanks to all the necessary parts were stored and in perfect condition. 6 units were produced in early 1998. The "Fénix" system was assigned to the 1103º BDAA 40mm. based at Fort Yaurepara in Zulia state. But they had problems with the tower's weight and shoot on the move. They were retired in 1998 and substituted by the AMX-13 M55/M4E1 "Ráfaga" 40mm also produced locally stored material advantage and in good condition. The "Fénix" is a M4E1 tower, recovered from a car M42 Duster and 2 M50 machine guns .30 caliber for Protective Part (a cylindrical tower made of welded armor plate with open top with twin mounting Bofors 40 mm gun), mounted on a tactical platform Truck 6x6 -ton Reo M-35.

Civilian conversions

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The M35-series trucks have been sold as surplus both to military vehicle collectors and to persons or organizations looking for an inexpensive truck capable of off-road operation. Users have included farmers, rural electric utilities, and fire departments. Surplus vehicles may be retained in military configuration, or modified to suit the needs of their new owners. Such modifications may include "bobbed" chassis with one of the rear axles removed, new cargo beds or boxes, fuel or water tanks, and conversion of the electrical system to 12 volts. One famous example is the "War Wagon", a bobbed M35A2 outfitted with a stepside pickup truck bed and painted in the colors of Auburn University. Its owner and builder, Terrell Glove can be seen driving the streets of Auburn, Alabama near Toomer's corner on football game days.''The Auburn Plainsman'', Print Edition, Feb 18, 2020

Localised versions

The M35 is otherwise known as the M6 or the M621 in the Norwegian Military, the main difference is that the truck as standard has airlockers on all 3 axles as opposed to none on the regular M35. Furthermore, the rear of the truck is normally singled out so that it sports 6 wheels instead of the normal 10.

Weight

Operators

* * * * * * ( Canadian Army replaced them with the MSVS) * * (Used by the

Chilean Army The Chilean Army ( es, Ejército de Chile) is the land arm of the Military of Chile. This 80,000-person army (9,200 of which are conscripts) is organized into six divisions, a special operations brigade and an air brigade. In recent years, and ...

and the Chilean Marine Corps) * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * called K-511, K-511A1 * * * (evaluation only) *(gradually replace with International 7400 4x4 trucks) * * * * (replaced by LMTV) * *

References

Citations

Sources

* *Lyles, James. ''The Hard Ride; Vietnam Gun Trucks (Volume II)''. Quezon City, Philippines: Planet Art, 2003 *Montes, Julio. ''Mexican and Central American Armor''. Darlington, Maryland: Darlington Publications, 2001 *Rottman, Gordon and Donald Spaulding. ''Vietnam Armor in Action''. Hong Kong, China: Concord Publications, 2002 *Spencer, David. ''Armored Fighting Vehicles of El Salvador''. Darlington, Maryland: Darlington Publications, 1995 * * * * * * * * *

External links

M35 series at Olive-Drab.com M35 Series Technical Manuals at NSN Depot
Vietnam-era gun truck replicas honor Vietnam Veterans
"New Army Truck Runs Under Water", September 1950, ''Popular Science''
first public article on M35 for general public – i.e. many rare photos
"The Submarine Truck's Secrets", June 1951, ''Popular Science''
scroll page past diver to see more rare photos of M35 trucks (i.e., then the M135 "Eager Beaver") – Yes, you are at the right page, scroll down past U.S. Army diver {{DEFAULTSORT:M35 2 1 2 Ton Cargo Truck Pickup trucks Military trucks of the United States Military vehicles introduced in the 1950s Six-wheeled vehicles