Detroit DD16 6 Cylinder 15.6 L Diesel 600 hp Engine, Engine Coolant Heater, Engine Brake, Eaton Fuller RTLO-18918B 18-Speed Manual Transmission, Double Differential Locks, 16000 lb Front Axle, 46000 lb Rears, Meritor RT46-164 Drive Axles, 3.91:1 Axle Ratio, 62000 lb GVWR, Air Ride Cab, 48 in Flat Top Sleeper Cab, Aluminum Wheels, 11R24.5, Airliner Air Ride Suspension, 230 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks