Heavy Expanded Mobility Tactical Truck
 
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. It is distinguished by extreme mobility compared to standard 5-ton trucks,
 thanks to its large number of wheels and turbo-charged engine, 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 Abrams tank.
 
| Type | 8x8 off-road cargo truck | 
|---|
| Place of origin | United States | 
| Service history | 
| In service | 1982-Present | 
| Used by | U.S. Army | 
| Production history | 
| Manufacturer | Oshkosh Corporation | 
| Unit cost | starting at US$135,000 | 
| Produced | 1982 to Present | 
| Number built | 13,000+ | 
| Variants | M977 cargo truck, M978 tanker, M983 tractor, M984 wrecker, M985 cargo truck | 
| Specifications (M977 A2) | 
| Weight | 38,800 lb (17,600 kg) | 
| Length | 33.4 ft (10.2 m) | 
| Width | 8 ft (2.4 m) | 
| Height | 9.3 ft (2.8 m) | 
| Crew | 2 | 
| 
 | 
| Engine | MTU Detroit Diesel 12.1 liter 445 hp (332 kW)
 | 
| Transmission | Allison 4500SP/5-speed automatic | 
| Suspension | Hendrickson w/equalizing beam | 
| Ground clearance | 24 in (610 mm) | 
| Fuel capacity | 155 US gal (587 l) | 
| Operational range
 | 400 mi (644 km) | 
| Speed | 62 mph (100 km/h) |