Cummins ISX 400ST 6 Cylinder 15 L Diesel 400 hp Engine, 22475 Engine hrs, Eaton Fuller FRM-15210B 10-Speed Manual Transmission, 12000 lb Front Axle, 22700 lb Rears, 2.53:1 Axle Ratio, 34700.0 lb GVWR, 275/80R22.5, AG400 4-Bag Air Ride Suspension, 158 in Wheelbase, Dual Fuel Tanks