Cummins 6 Cylinder Diesel Engine, Engine Brake, Eaton Fuller 10-Speed Manual Transmission, 12000 lb Front Axle, 34000 lb Rears, 46000 lb GVWR, Air Ride Cab, 275/80R22.5, Air Ride Suspension, 158 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks