Detroit DD15 6 Cylinder 14.8 L Diesel 505 hp Engine, 2015 US EPA Label, Requires Diesel Exhaust Fluid, 24978 Engine hrs, Engine Brake, Detroit DT12-OA-1650 HD 12-Speed Automatic Transmission, 13220 lb Front Axle, 40000 lb Rears, Meritor MT-40-14X Drive Axles, 3.25:1 Axle Ratio, 53220 lb GVWR, Air Ride Cab, 60 in High Rise Sleeper Cab, Bunk Beds, Bunk Heater, Aluminum Wheels, 11R22.5, Airliner Air Ride Suspension, 232 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks