Cummins ISM 6 Cylinder 10.8 L Diesel Engine, Meritor RM10-135A 10-Speed Manual Transmission, 12000 lb Front Axle, 38000 lb Rears, Meritor RT-40-145 Drive Axles, 50000 lb GVWR, Air Ride Cab, 11R22.5, Volvo Air Ride Suspension, 159 in Wheelbase, Dual Fuel Tanks