Cummins 6 Cylinder Diesel Engine, Engine Brake, Eaton Fuller 18-Speed Manual Transmission, 12000 lb Front Axle, 40000 lb Rears, 56 in Mid Roof Sleeper Cab, Aluminum Wheels, 11R24.5, Air Ride Suspension, 244 in Wheelbase, PTO, Air Sliding 5th Wheel, Dual Fuel Tanks