Cat 3406 6 Cylinder 14.6 L Diesel Engine, Eaton Fuller 18-Speed Manual Transmission, Differential Lock, 12000 lb Front Axle, 45120 lb Rears, 74120.0 lb GVWR, Aluminum Outer Wheels, 315/80R22.5 Front Tires, 11R24.5 Rear Tires, Air Lift Pusher Axle, Double Frame, Hendrickson Spring over Walking Beam Suspension, 234 in Wheelbase, Air Sliding 5th Wheel, Headache Rack, Lowboy Ramps, Dual Fuel Tanks