Cat 6 Cylinder 7.2 L Diesel Engine, Positive Air Shutoff, Engine Brake, Eaton Fuller 9-Speed Manual Transmission, 12000 lb Front Axle, 40000 lb Rears, 52000 lb GVWR, 11R22.5, Double Frame, Airliner Air Ride Suspension, 270 in Wheelbase, Canuck Diesel-Fired Boiler, Durabody 24 ft x 96 in Wide x 96 in High Body, Liftgate