Detroit DD13 6 Cylinder 12.8 L Ultra Low Sulfur Diesel 435 hp Engine, 2018 US EPA Label, Requires Diesel Exhaust Fluid, 20473 Engine hrs, Engine Brake, Detroit DT12-V 12-Speed Automated Transmission, 12000 lb Front Axle, 40000 lb Rears, Meritor MT-40-14X Drive Axles, 3.08:1 Axle Ratio, 52000.0 lb GVWR, Air Ride Cab, 72 in Mid Roof Sleeper Cab, Aluminum Wheels, 275/80R22.5, Airliner Air Ride Suspension, 220 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks