Cat C15 6 Cylinder 15.2 L Diesel 595 hp Engine, Air Conditioner, Power Windows, Engine Brake, Eaton Fuller RTLO-16913A 13-Speed Manual Transmission, 12000 lb Front Axle, 34000 lb Rears, Spicer Drive Axles, 46000 lb GVWR, Air Ride Cab, Aluminum Wheels, 285/75R24.5, Low Air Leaf Air Ride Suspension, 258 in Wheelbase, Air Sliding 5th Wheel