Cat C15 6 Cylinder Diesel Engine, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Eaton Fuller 18-Speed Manual Transmission, 12000 lb Front Axle, 38000 lb Rears, Air Ride Cab, 63 in High Rise Sleeper Cab, Aluminum Wheels, 11R22.5, Air Leaf Air Ride Suspension, 250 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks