Detroit DD13 6 Cylinder 12.8 L Ultra Low Sulfur Diesel 435 hp Engine, 2015 US EPA Label, Requires Diesel Exhaust Fluid, 9560 Engine hrs, Eaton Fuller FRO-15210C 10-Speed Manual Transmission, 12000 lb Front Axle, 21000 lb Rears, Meritor RS-23-161 Drive Axles, 3.73:1 Axle Ratio, Air Ride Cab, 11R22.5, Airliner Air Ride Suspension, 154 in Wheelbase, Dual Fuel Tanks