Detroit DD15 6 Cylinder 14.8 L Ultra Low Sulfur Diesel 400 hp Engine, 2015 US EPA Label, Requires Diesel Exhaust Fluid, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Detroit DT12-DA-1750 HD 12-Speed Automated Transmission, 12000 lb Front Axle, 40000 lb Rears, 2.28:1 Axle Ratio, 52000 lb GVWR, Air Ride Cab, 72 in High Rise Sleeper Cab, Bunk Beds, Aluminum Wheels, 295/75R22.5 Front Tires, 295/75R22.5 Rear Tires, Airliner Air Ride Suspension, 218 in Wheelbase, Dual Fuel Tanks