Cummins ISB 6 Cylinder 6.7 L Diesel 260 hp Engine, 2013 US EPA Label, Requires Diesel Exhaust Fluid, 7823 Engine hrs, Allison 2500 Automatic Transmission, 12000 lb Front Axle, 21000 lb Rears, Meritor MS-21-14X Drive Axles, 5.29:1 Axle Ratio, 33000 lb GVWR, Air Ride Cab, Aluminum Front Wheels, 11R22.5 Front Tires, 295/75R22.5 Rear Tires, Spring Suspension, 254 in Wheelbase, 24 ft x 96 in Bed