Detroit DD15 6 Cylinder 14.8 L Ultra Low Sulfur Diesel 505 hp Engine, US EPA Label, Requires Diesel Exhaust Fluid, Engine Brake, Eaton Fuller FRO-16210C 10-Speed Manual Transmission, 12000 lb Front Axle, 46000 lb Rears, Meritor Drive Axles, 3.91:1 Axle Ratio, 58000.0 lb GVWR, Air Ride Cab, 11R24.5, Airliner Air Ride Suspension, 220 in Wheelbase, Headache Rack, Dual Fuel Tanks