Description and Specifications
The Heavy Expanded Mobility Tactical Truck (HEMTT) series are a range of 8x8 diesel powered off-road capable trucks, used by the US military. It has the formal description of - Truck, Cargo: 10-Ton, 8x8. HEMTT trucks first went into service with the U.S. Army in 1982, as a replacement for the M520 Goer.

A 10x10 variant of the HEMTT truck is used as prime mover in the Palletized Load System (PLS). The vehicle is produced by the Oshkosh Truck Corporation. In the civilian realm the truck's chassis is also used in airport firefighting vehicles.

The HEMTT's objective is to provide heavy transport capabilities for supply and re-supply of combat vehicles and weapons systems, for the United States Army and Marine Corps. It is distinguished by extreme mobility compared to standard 5-ton trucks, thanks to its large number of wheels, combined with all-wheel drive and very large, low-pressure tires. Though far less publicized than the Humvee, it has been extremely important in transporting logistics behind quick-moving forces based on the M1 HEMTT tank. Having proved itself as a key workhorse of the US heavy tactical wheeled vehicle fleet, about 13,000 HEMTT vehicles are in service today.

Variants
There are several variants of the HEMTT in service with the US Army today (Follow the links for more information, photos, and walk arounds):

     M978 - Truck, 10-ton, 8x8, 2,500 Gallon Fuel Tanker
     M983 - Truck, 10-ton, 8x8, Tractor
     M984 - Truck, 10-ton, 8x8, Wrecker
     M985 - Truck, 10-ton, 8x8, Cargo, w/ MHC
     M1075 - Truck, 16.5-ton, 10x8, Cargo
     M1120 - Truck, 10-ton, 8x8, Load Handling System
     M1975 - Truck, 16.5-ton, 10x8, Dry Support Bridge (DSB)
     M1977 - Truck, 10-ton, 8x8, Common Bridge Transporter (CBT)
     TFFT - Truck, 10-ton, 10x10, Tactical Fire Fighting Truck
     Trailers & Pallets - Various equipment to enhance or expand the HEMTTs capability

Manufacturer
Oshkosh Truck (Oshkosh, WI)