Cat 3406 14.6 L Diesel Engine, Air Conditioner, Power Windows, Engine Brake, Eaton Fuller RTLO-18718B 18-Speed Manual Transmission, 12000 lb Front Axle, 38000 lb Rears, Eaton Drive Axles, 50000 lb GVWR, Air Ride Cab, Aluminum Wheels, 285/75R24.5, Low Air Leaf Air Ride Suspension, 258 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks, 7 in stacks, stainless steel chrome, 70/30 hydraulic tank