Cummins ISX 475 6 Cylinder 15 L Diesel 475 hp Engine, 2004 US EPA Label, 26760 Engine hrs, Engine Brake, Eaton Fuller 13-Speed Manual Transmission, 12000 lb Front Axle, 40000 lb Rears, Meritor RT-46-160 Drive Axles, 52000 lb GVWR, Air Ride Cab, Aluminum Wheels, 11R22.5 Front Tires, 11R22.5 Rear Tires, Rubber over Walking Beam Suspension, 184 in Wheelbase