V8 Diesel Engine, Requires Diesel Exhaust Fluid, 6238.8 Engine hrs, Allison Automatic Transmission, 7500 lb Front Axle, 15000 lb Rears, 19500.0 lb GVWR, Aluminum Outer Wheels, 225/70R19.5 Front Tires, 225/70R19.5 Rear Tires, Spring Suspension, 199 in Wheelbase, 86 in Cab to Axle, 137 in Cab to End of Frame