Detroit DD13 12.8 L Diesel 410 hp Engine, Air Conditioner, Cruise Control, Power Windows, Allison Automatic Transmission, 12000 lb Front Axle, 23000 lb Rears, Meritor RS-23-160 Drive Axles, 4.30:1 Axle Ratio, 35000 lb GVWR, Air Ride Cab, 295/75R22.5 Front Tires, 275/80R22.5 Rear Tires, Airliner Air Ride Suspension, 162 in Wheelbase