Detroit DD15 6 Cylinder 14.8 L Diesel 455 hp Engine, 2008 US EPA Label, 38739 Engine hrs, Engine Brake, Eaton Fuller FR-15210B 10-Speed Manual Transmission, Meritor RT-40-145 Drive Axles, 2.64:1 Axle Ratio, 72 in High Rise Sleeper Cab, Bunk Beds, Aluminum Outer Wheels, 295/75R22.5, Airliner Air Ride Suspension, 226 in Wheelbase, Air Sliding 5th Wheel