| M977 | M978 | M985 | M983 | M984 | |
|---|---|---|---|---|---|
| Length | 401 in | 401 in | 401 in | 351 in | 392 in |
| Height (all) | Operational 112 in, Transport 102 in | ||||
| Width (all) | 96 in | ||||
| Wheelbase | 210 in | 210 in | 210 in | 181 in | 191 in |
| Turning circle | 100 in | 100 in | 100 in | 91 in | 95 in |
| Ground clearance (all) | 24 in | ||||
| Vehicle curb weight | 38,800 lbs; w/o winch - 37,900 lbs | 38,200 lbs; w/o winch - 37,300 lbs | 39,600 lbs; w/o winch - 38,700 lbs | 39,200 lbs; w/o crane - 32,200 lbs | 50,900 lbs |
| Max speed (all) | 57 mph | ||||
| Cruising range (all) | 300 mi | ||||
| Maximum grade (all) | 60% with payload of 22,000 lbs | ||||
| Engine (all) | 450 hp @ 2100 rpm Detroit Diesel Allison Model 8V92TA. 8 cylinder, 2-stroke, V-type Diesel. An electronic controller for the engine went into production in April 2002. | ||||
| Transmission (all) | 4-speed automatic & 2-speed Oshkosh transfer case w/ air-operated front tandem axle disconnect. A new electronic transmission went into production in April 2002. | ||||
| Crew(all) | Two | ||||