Detroit DD13 6 Cylinder 12.8 L Ultra Low Sulfur Diesel 435 hp Engine, Requires Diesel Exhaust Fluid, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Eaton Fuller FRO-15210C 10-Speed Manual Transmission, 12000 lb Front Axle, 40000 lb Rears, Spicer DS404 Drive Axles, 3.70:1 Axle Ratio, 52000 lb GVWR, Air Ride Cab, 11R22.5 Front Tires, 11R22.5 Rear Tires, Airliner Air Ride Suspension, 178 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks