Detroit DD15 6 Cylinder Diesel 505 hp Engine, Requires Diesel Exhaust Fluid, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Detroit DT12-1650-IH1 12-Speed Automatic Transmission, Differential Lock, 12350 lb Front Axle, 40000 lb Rears, 3.07:1 Axle Ratio, 52350 lb GVWR, Air Ride Cab, 72 in High Rise Sleeper Cab, Bunk Beds, 11R22.5 Front Tires, 11R22.5 Rear Tires, Airliner Air Ride Suspension, 231 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks