Cummins ISM 6 Cylinder Ultra Low Sulfur Diesel Engine, 18310 Engine hrs, Air Conditioner, Cruise Control, Power Windows, Eaton Fuller Automatic Transmission, 12000 lb Front Axle, 40000 lb Rears, 52000 lb GVWR, Air Ride Cab, 295/75R22.5, Air Ride Suspension, 172 in Wheelbase, Air Sliding 5th Wheel

D12 12.1 L Diesel Engine, Engine Brake, Differential Lock, 12500 lb Front Axle, 38000 lb Rears, 3.58:1 Axle Ratio, 50350 lb GVWR, Air Ride Cab, 295/75R22.5, Air Ride Suspension, 190 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks