6 Cylinder 6.7 L Diesel Engine, Requires Diesel Exhaust Fluid, 13813.1 Engine hrs, Allison Automatic Transmission, 12000 lb Front Axle, 21000 lb Rears, 33000.0 lb GVWR, 11R22.5 Front Tires, 11R22.5 Rear Tires, Spring Suspension, 234 in Wheelbase