Cat C12 6 Cylinder Diesel Engine, Air Conditioner, Cruise Control, Engine Brake, Allison Automatic Transmission, Differential Lock, 18000 lb Front Axle, 40000 lb Rears, 58000 lb GVWR, 385/65R22.5 Front Tires, 11R22.5 Rear Tires, Dual Steering Boxes, Walking Beam Suspension, 209 in Wheelbase, Double Frame, Grease Barrel