Detroit DD15 6 Cylinder 14.8 L Diesel 505 hp Engine, Requires Diesel Exhaust Fluid, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Eaton Fuller FRO-16210C 10-Speed Manual Transmission, 13300 lb Front Axle, 40000 lb Rears, 3.42:1 Axle Ratio, 53300 lb GVWR, Air Ride Cab, 70 in High Rise Sleeper Cab, Bunk Beds, Thermo King Tripac Auxiliary Power Unit, Aluminum Wheels, 295/75R22.5 Front Tires, 295/75R22.5 Rear Tires, Airliner Air Ride Suspension, 268 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks