Detroit DD13 6 Cylinder 12.8 L Ultra Low Sulfur Diesel 435 hp Engine, 2018 US EPA Label, Requires Diesel Exhaust Fluid, 14761 Engine hrs, Engine Brake, Detroit DT12-1550-DH1 12-Speed Automated Transmission, Double Differential Locks, 13300 lb Front Axle, 40000 lb Rears, Detroit DA-RT-40.0-4S Drive Axles, 2.41:1 Axle Ratio, 53300 lb GVWR, Air Ride Cab, Aluminum Wheels, 11R22.5, Airliner Air Ride Suspension, 174 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks