Machine description: Detroit DD13 6 Cylinder 12.8 L Diesel Engine, Requires Diesel Exhaust Fluid, Automated Transmission, 20000 lb Front Axle, 46000 lb Rears, 66000 lb GVWR, Air Ride Cab, Aluminum Front Wheels, 425/65R22.... more info about the 2016 Western Star 4700SB.