Cat 3126 6 Cylinder 7.2 L Diesel 330 hp Engine, 2001 US EPA Label, Eaton Fuller 9-Speed Manual Transmission, 13220 lb Front Axle, 40000 lb Rears, 53220 lb GVWR, Aluminum Outer Wheels, 11R22.5, Double Frame, Airliner Air Ride Suspension, 235 in Wheelbase, 170 in Cab to Axle, 265 in Cab to End of Frame