The Heavy Expanded Mobility Tactical Truck (HEMTT) is an eight-wheel drive, diesel-powered, tactical truck used by the US military and others. In evolving configurations it has been in continuous production since 1982.
There are seven main configurations of the HEMTT series trucks: M977 cargo truck (three variants), M978 9,500 liter tanker, M983 tractor, M984 wrecker, M985 cargo truck (two variants), M1120 LHS and M1977 CBT. A tactical fire-fighting truck (M1142 TFFT) and support tanker (M1158 HEWATT) are also available, as is a Terminal (formerly Theatre) High Altitude Area Defense (THAAD) missile launcher.
By early 2015 more than 27,000 HEMTTs in various configurations had been produced by Oshkosh Defense through either new-build or re-manufactured. Current variants have the A4 suffix.
M1977 Combat Bridge Transport CBT)
M1142 Tactical Fire Fighting Truck (TFFT)
Early production HEMTT transporting MLRS rounds
U.S. Army M978A2 8x8 HEMTT (fuel) Tanker at Wiesbaden Army Airfield in Germany