Cummins M11 6 Cylinder Diesel 330 hp Engine, 1999 US EPA Label, CARB Compliant, Engine Brake, Eaton Fuller RTX-12710B 10-Speed Manual Transmission, Differential Lock, 12860 lb Front Axle, 40000 lb Rears, 4.33:1 Axle Ratio, 52860 lb GVWR, Air Ride Cab, Aluminum Wheels, 11R24.5, Airliner Air Ride Suspension, 270 in Wheelbase, Durabody 28 ft x 102 in Wide x 96 in High Body, Curbside Door, Liftgate, shelving