Detroit DD15 6 Cylinder 14.8 L Ultra Low Sulfur Diesel 455 hp Engine, Requires Diesel Exhaust Fluid, 38397 Engine hrs, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Detroit DD12-OA-1650 HD 12-Speed Automated Transmission, 12000 lb Front Axle, 40000 lb Rears, 3.25:1 Axle Ratio, 52000 lb GVWR, Air Ride Cab, 60 in Mid Roof Sleeper Cab, 295/75R22.5 Front Tires, 445/50R22.5 Super Singles Rear Tires, Airliner Air Ride Suspension, 240 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks