The Truck, Tractor: 20-Ton, Light Equipment, 6x6, 56,000 GVW M916 are used primarily with to tow compatible semitrailers -- low bed type M172A1, 25-ton payload and M870, 40-ton payload -- to transport engineer construction equipment in the local, line haul and maintenance evacuation missions on primary, secondary and off-road conditions. They have an on-board winch capable of pulling engineer construction equipment onto the M870 semitrailer. The maximum GCVW, when towing the M870 40-ton semitrailer, is 130,000 pounds. Freightliner delivered more than 1,070 of these vehicles to the Army from 1990 to the 2000s.  This vehicle is equipped with a 400HP Cummins Engine and a Caterpillar 16-Speed Semi Automatic D7155 Overdrive Air Contriol Power Shift Transmission, Oshkosh Model F-U29 (18000) Series Transfer Case and Rockwell Axles.