Detroit 6 Cylinder Diesel Engine, Requires Diesel Exhaust Fluid, Eaton Fuller 10-Speed Manual Transmission, 12350 lb Front Axle, 40000 lb Rears, 52350 lb GVWR, Air Ride Cab, 60 in High Rise Sleeper Cab, Bunk Beds, 295/75R22.5, Air Ride Suspension, 252 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks