Mack 6 Cylinder Diesel Engine, 20522.2 Engine hrs, Air Conditioner, Cruise Control, Power Windows, Allison Automatic Transmission, 12000 lb Front Axle, 40000 lb Rears, 52000 lb GVWR, Air Ride Cab, 295/75R22.5, Air Ride Suspension, 161 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks