Detroit DD13 12.8 L Diesel Engine, US EPA Label, Requires Diesel Exhaust Fluid, 12601 Engine hrs, Air Conditioner, Cruise Control, Power Windows, Detroit DT12-1450-DH1-8 HD 12-Speed Automated Transmission, 12000 lb Front Axle, 40000 lb Rears, Meritor MT-40-14X Drive Axles, 2.47:1 Axle Ratio, 52000 lb GVWR, Air Ride Cab, Aluminum Wheels, 295/75R22.5 Front Tires, 445/50R22.5 Super Singles Rear Tires, Airliner Air Ride Suspension, 164 in Wheelbase, Air Sliding 5th Wheel