Cummins ISL 8.9 L Ultra Low Sulfur Diesel Engine, Requires Diesel Exhaust Fluid, Allison 4500 Automatic Transmission, 20000 lb Front Axle, 46000 lb Rears, Dana D46-170 Drive Axles, 5.38:1 Axle Ratio, 65000 lb GVWR, Aluminum Front Wheels, 315/80R22.5 Front Tires, 315/80R22.5 Rear Tires, Hendrickson Haulmaax Rubber over Walking Beam Suspension, 208 in Wheelbase, PTO, New Way Collection Body