Volvo 6 Cylinder Ultra Low Sulfur Diesel Engine, Requires Diesel Exhaust Fluid, 20603.7 Engine hrs, Engine Brake, Volvo Automated Transmission, 12000 lb Front Axle, 20000 lb Rears, 32000 lb GVWR, Air Ride Cab, 275/80R22.5 Front Tires, 295/75R22.5 Rear Tires, Air Ride Suspension, 156 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks