Cummins ISX15 6 Cylinder Diesel 550 hp Engine, 2009 US EPA Label, 11996.9 Engine hrs, Air Conditioner, Cruise Control, Power Windows, Engine Brake, Eaton Fuller RTLO-1891 18-Speed Manual Transmission, Double Differential Locks, 7258 kg Front Axle, 20866 kg Rears, 4.10:1 Axle Ratio, 35381 kg GVWR, Air Ride Cab, Aluminum Wheels, 315/80R22.5 Front Tires, 11R22.5 Rear Tires, Air Lift Pusher Axle, Air Lift Tag Axle, Dual Steering Boxes, Double Frame, Hendrickson Air Ride Suspension, 256 in Wheelbase, PTO, Wet Kit, Air Sliding 5th Wheel, Auto Lube, Dual Fuel Tanks