Detroit DD13 6 Cylinder 12.8 L Ultra Low Sulfur Diesel 450 hp Engine, US EPA Label, Requires Diesel Exhaust Fluid, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Eaton Fuller FRO-16210C 10-Speed Manual Transmission, 13220 lb Front Axle, 40000 lb Rears, Detroit DA-RT-40.0-4 Drive Axles, 3.31:1 Axle Ratio, 53220 lb GVWR, Air Ride Cab, 70 in High Rise Sleeper Cab, Bunk Beds, Aluminum Outer Wheels, 295/75R22.5, Airliner Air Ride Suspension, 228 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks