UNITED24 - Make a charitable donation in support of Ukraine!


Family of Medium Tactical Vehicles (FMTV)

The Family of Medium Tactical Vehicles (FMTV) is a series of vehicles consisting of up to 23 variants and 17 different models, ranging from 2.5-ton to 5-ton payloads. The Department of the Army announced February 12, 2010 that it had re-evaluated the contract award decision for its Family of Medium Tactical Vehicles (FMTV) originally made on Aug. 26, 2009. This change was based on Government Accountability Office's (GAO) recommendations. Accordingly, Oshkosh Corp. was awarded a competitive, five-year requirements contract for production of up to 12,415 trucks, 10,926 trailers, and associated support and engineering services. The total estimated contract value at award was $3.023 billion. The Army originally awarded the contract to Oshkosh, but BAE Systems, Tactical Vehicles LP and Navistar, LLC filed GAO protests against the contract award to Oshkosh. From Dec. 21, 2009, to Jan. 22, 2010, the Army re-evaluated the proposals in accordance with the GAO's recommendation. Subsequently, there was an Office of the Secretary of Defense peer review affirming the Army's reevaluation process. Oshkosh already produces the Army's Family of Heavy Tactical Vehicles (FHTV) and works with nearly every one of the FMTV current component suppliers across the country as integral partners in other military programs. Oshkosh is the only current manufacturer of both medium and heavy tactical wheeled vehicles in the U.S. defense industry, having produced more than 70,000 military-class vehicles in its manufacturing facilities.

The Family of Medium Tactical Vehicles (FMTV) is a series of fourteen variant vehicles based on a common chassis, which vary by payload and mission requirements. The Family of Medium Tactical Vehicles consists of of tactical wheeled vehicles based on a common truck cab, chassis, and internal components and two tactical trailers. The components are primarily non-developmental items integrated in rugged tactical configurations. The FMTVs, all automatic, come in 14 variations of 2.5-ton cargo and van models and 5-ton cargo, tractor, van, wrecker, tanker and dump-truck models. Eighty percent commonality of parts - same engines, transmissions, drivelines, power trains, tires, cabs - in the new trucks is expected to save the Army millions of dollars in maintenance costs. Lighter-weight construction will cut fuel costs dramatically. The vehicle's cab-over design - in which engine, fluids and hydraulics are all accessible in one place, under the cab - makes regular maintenance much easier.

What soldiers do like about the FMTV is its comfortable ride, a shorter turning radius that makes it more maneuverable, and the improved cargo roof. The pitch of the tarp-over-steel bow was increased and replaced tarp over aluminum, after a number of the cargo roofs collapsed under heavy loads.

The FMTV has an unparalleled history of superior reliability and off-road mobility, with an incomparable 13,333 mean miles between hardware mission failure and 98 percent operational readiness. Stewart & Stevenson has produced more than 20,000 FMTV trucks and trailers and has established a record of 37 consecutive months of 100 percent on time delivery of trucks, 28 consecutive months of trailer deliveries and 23 straight months without missing a schedule for spares.

The LMTV (Light Medium Tactical Vehicle) has a 2.5-ton capacity (cargo and van models). The MTV (Medium Tactical Vehicle) has a 5-ton capacity (cargo and long-wheelbase cargo with and without materiel handling equipment, tractor, van, wrecker, and dump truck models). Three truck variants and two companion trailers, with the same cube and payload capacity as their prime movers, provide air drop capability. Van and tanker variants of the MTV will be developed concurrent with the production of other models. The FMTV will perform line haul, local haul, unit mobility, unit resupply, and other missions in combat, combat support, and combat service support units. Vehicles will operate worldwide on primary and secondary roads and trails. The FMTV will replace over-aged and maintenance-intensive trucks currently in the medium tactical vehicle fleet.

The FMTV replaces obsolete and maintenance-intensive trucks currently in the fleet and performs local and line haul, unit mobility, unit resupply, and other missions in combat, combat support and combat service support units. It is rapidly deployable worldwide and operates on primary and secondary roads, trails, and cross-country terrain, in all climatic conditions. Commonality of parts across truck chassis variants significantly reduces the logistics burden and operating and support costs. New vehicle applications are being developed to meet new requirements.

The Army's medium tactical vehicle inventory, which consisted of approximately 95,460 2-1/2-ton and 5-ton vehicles, was costly to maintain and operate. Also, the 2-1/2-ton vehicle had key operational limitations. The Army planned to modernize the medium tactical vehicle inventory through the FMTV Program. The FMTV Program features non-developmental items whereby existing commercial components are modified as required and integrated into vehicles intended to meet military needs. The FMTV Program was structured to acquire 85,401 medium tactical vehicles by FY 2021. The Army estimated that the total cost of the Program would be $16.3 billion (then-year dollars).

In October 1991, the Army awarded a 5-year, firm-fixed-price contract, valued at $1.2 billion, to Stewart and Stevenson Services, Incorporated (the Contractor), for the production of 10,843 vehicles. As of June 30, 1995, the FMTV Program was about 18 months behind schedule. The Army has awarded a new four-year, multi-year plus option year contract with Stewart and Stevenson (S&S), beginning with FY98 requirements. This new contract is for the "A1" version of the FMTV, which includes a 1998 Environmental Protection Agency-certified engine, upgraded transmission, electronic data bus, an anti-lock brake system and interactive electronic technical manuals. To be built are the new FMTV 2.5-and five-ton tactical trailers that have the same cube and payload capacity as their prime mover. In July 2003 Stewart & Stevenson Services, Inc. (NYSE: SVC), a leading manufacturer, distributor and provider of service for industrial and energy related equipment, and a manufacturer of medium tactical vehicles for the U.S. Army, announced that its subsidiary, Stewart & Stevenson Tactical Vehicle Systems, LP (TVS), has been awarded three contract modifications by The U.S. Army Tank-automotive and Armaments Command (TACOM) totaling more than $80 million for Family of Medium Tactical Vehicles (FMTV) trucks and trailers. The contract modifications include a $42 million option that calls for the delivery of 44 HIMARS Launcher Chassis, 104 HIMARS Resupply Vehicles and 104 Resupply Trailers. Deliveries are scheduled to be completed by December 31, 2004.

By early 2000 more than 7,600 original-model Family of Medium Tactical Vehicle trucks, known as the A0 models, had been delivered to units Armywide since January 1996 as part of a $1.4 billion, five-year contract with the Stewart and Stevenson Company of Houston, Texas. The A0 trucks began replacing the Army's aging, 30-year-old fleet of 2.5- ton and 5-ton trucks, whose parts were becoming obsolete.

The Army's old 5-ton trucks were involved in 428 accidents, 128 of them roll-overs that killed 41 soldiers and 13 civilians, between 1992 and 1995 When the Army chose to develop new trucks, safety was a key concern.

The FMTV program initially experienced some bad press following 13 accidents involving A0-model trucks. One of the accidents resulted in a rollover attributed to a driveline design flaw. A March 1998 safety message to drivers noted that the vehicles can operate at fairly high highway speeds. But at the 45- to 58-mph range, they found a resonance or vibration in the engine-transmission-driveshaft combination. The vibration stressed the truck's u-joints, which could cause the driveshaft to fail.

Before the recall, soldiers were allowed to operate the vehicles at 55 mph, and most didn't have any real problems. When the 'safety gram' came down because of the vehicle mishaps, drivers had to drop their speed 30 mph. Stewart and Stevenson subcontractors continued to upgrade A0-model FMTVs to reinforce the vehicles' drivelines and u-joints. Besides the company's own on-site retrofit facility, co-located with its assembly facility in Sealy, Texas, retrofit centers were located throughout the Army. In December 1999 three were operating at Fort Bragg, where soldiers from the 528th awaited retrofit of some 375 vehicles. Once the vehicles are retrofitted, soldiers can drive them at normal operating speeds, after completing several simple checks and displaying a black letter "D" in the vehicles' windshields so MPs know they're good to go. As of 01 December 199, 40 percent, about 4,100, of the Army's FMTVs had been retrofitted, and some 6,000 FMTVs remained to be retrofitted.

The trucks had a number of headaches, with numerous glitches truck unit soldiers experienced. Their "headaches" included alternator, battery and headlight failures. Other problems - such as bent tail-light brackets, doors and tailgates - are primarily due to the large number of aluminum parts that replace the sturdier steel parts of the Army's old trucks. Rear bumpers came off in some instances when drivers failed to raise the trucks' mud flaps before backing up. When the flaps are down, the wheels ride over them, putting so much pressure on the bumper it tears off.

The old 800-series trucks, reputed to be among the best inventions ever for the Army, weren't without problems after initial fielding either. In fact, there were four versions of that vehicle. And when the Humvee was first introduced, broken bolts were a common problem.

In early 2000 Army Acquisition Executive Paul J. Hoeper approved production of modified (A1) versions of the 2-ton (M1087A1) and 5-ton (M1083A1) trucks after prototypes successfully completed 90,000 miles of testing at Aberdeen Proving Ground, Maryland. This will produce and field a truck with eight times the reliability, availability, and maintainability of the old `deuce-and-a-half' truck it replaces. The new M1087A1 and M1083A1 trucks have more powerful diesel engines, seven-speed automatic transmissions, improved brakes, added corrosion protection, computerized engine diagnostics, and heavy-duty drive-line engine-transmission-differential connections. The trucks also will have more durable seating material and cargo tarps, sturdier door hinges, and reinforced footholds to make it easier to enter the cargo section.

The A1's will be manufactured according to military specifications, but the family of medium tactical vehicles (FMTV) contractor, Stewart and Stevenson, Inc., of Houston, Texas, will use commercial components. This process will enable the Army to purchase more trucks at less cost. The new trucks have been engineered to make them easier to airlift, and some models will be designed specifically for airdrop. According to officials, the Army needs 85,000 new trucks to replace its aging fleet. Soldiers should start receiving the new A1's in March. FMTV trucks issued to Army units since January 1996 will be refitted with stronger U-joints and flywheel housings and larger diameter drive shafts.

The US Army commenced a competition to add a second supplier to build Family of Medium Tactical Vehicles in 1998. Oshkosh Truck Corp. received a $1.9 million contract in November 1998 to compete with one other truck manufacturer to qualify as a second source to produce three trucks for testing by the DoD under Phase I of its second source supplier qualification plan. The three Oshkosh FMTVs produced under this contract have successfully completed Phase I testing. The fiscal year 2000 Defense Authorization Act cancelled the second source program; however, it directed the Army to go forward with a competition for 100% of the next procurement.

Initially, the FMTV competition was scheduled to begin in October 2000 with the issuance of a request for proposal ("RFP") to retrofit three trucks for testing, to be followed by a period of testing, another RFP for firm production pricing and then conclude with a contract award in March or April 2002. In late September 2000, the DoD delayed the competition to permit engine manufacturers more time to develop engines for the FMTV that will be compliant with U.S. Environmental Protection Agency regulations for diesel engines sold in 2004. The DoD's RFP issued in December 2000 requires retrofit of six trucks for testing. The period for follow-on testing and submission of production pricing was extended so that a contract award for production of approximately 14,000 FMTV trucks and trailers was planned by the DoD for the second quarter of fiscal 2003.

In April 2003 the United States Army awarded the Family of Medium Tactical Vehicles (FMTV) A1 Competitive Rebuy production contract to Stewart & Stevenson Tactical Vehicle Systems, LP (TVS), a division of Stewart & Stevenson Services, Inc. (NYSE: SVC). The contract, potentially worth more than $2 billion, was issued by the Army's Tank-automotive and Armament Command (TACOM) and includes production that could reach nearly 11,000 FMTV trucks and trailers over five years, with an option for 12,000 additional vehicles.

Every identified problem in the original A0 model will be fixed in the newer model Al. The manufacturer did a good job of going to the field and talking to soldiers to find out what needs to be done. Noted difficulties aside, the original A0-model FMTV demonstrated more than double the contract-specified reliability requirements for some variants. Those results prompted the Army to almost double the standards for the A1 model FMTVs. The contract required that the A1 operate for 5,500 miles without any hardware failure. During those tests, the vehicles recorded more than 13,000 failure-free miles.

The FMTV A1 series includes a 1999 Environmental Protection Agency-certified engine, upgraded transmission, electronic data bus, an anti-lock brake system and interactive electronic technical manuals. Developmental testing of the A1 model truck in FY98-99 uncovered several additional problem areas, and new performance, reliability, and safety issues have arisen: leaf spring breaks, electromagnetic interference from the new engine electronic control module, and frame integrity. Frame integrity is perhaps the most troubling since it may be the most difficult to fix.

According to the DOT&E, based on prior operational test and evaluation and current production testing, the FMTV trucks continue to be effective and suitable. The reliability for each of the variants has improved from the A0 to the re-buy trucks. The minor changes between the A1 truck and the re-buy trucks do not require additional operational testing. Residual concerns can be addressed in the planned production verification tests and the limited user tests of the expansible van, the load-handling system truck-with-trailer, and the 10-ton dump truck. The Test and Evaluation Master Plan will be updated to reflect this. The program intends to provide armor kits for use on trucks deployed to Iraq. The Test and Evaluation Master Plan will include plans to conduct survivability testing of trucks with these armor kits. Although safety issues related to failed drivelines have been addressed with modified driveshafts, the program office is investigating an improved driveshaft.

  LMTV A1 Cargo MTV A1 Cargo
Payload: 5,000 lbs 10,000 lbs
Towed load: 12,000 lbs 21,000 lbs
Engine: JP8 fuel JP8 fuel
Transmission: Automatic Automatic
Horsepower: 275 330
Drive: 4x4 6x6

Human Factors Engineering requires 22 inches of shoulder room for a 95th percentile (large) combat clothed soldier. So after saying that, below are the maximum troop carrying capacities for A0, and A1, 2.5 and 5 Ton FMTVs. TB 9-639 "Passenger-Carrying capacity of Tactical and Administrative Vehicles Commonly Used To Transport Personnel" is being changed to reflect the below information.






2.5 Ton

Standard/LVAD Cargo Truck

12 feet


5 Ton

Standard/LVAD Dump Truck

12 feet


5 Ton

Standard/LVAD Cargo Truck

14 feet


5 Ton

Long Wheel Base Cargo Truck

20 feet


Join the GlobalSecurity.org mailing list

Page last modified: 07-07-2011 02:43:14 ZULU