Detroit DD15 6 Cylinder 14.8 L Ultra Low Sulfur Diesel 505 hp Engine, 2018 US EPA Label, Requires Diesel Exhaust Fluid, 23570 Engine hrs, Detroit DT12-1650-OH1 12-Speed Automatic Transmission, 12350 lb Front Axle, 40000 lb Rears, Meritor MT-40-14X Drive Axles, 3.08:1 Axle Ratio, 52350 lb GVWR, Air Ride Cab, 72 in High Rise Sleeper Cab, Bunk Beds, Aluminum Outer Wheels, 295/75R22.5, Airliner Air Ride Suspension, 229 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks