Volvo D13H425 6 Cylinder 12.8 L Ultra Low Sulfur Diesel 425 hp Engine, 2013 US EPA Label, Requires Diesel Exhaust Fluid, 11990 Engine hrs, Engine Brake, Volvo ATO2612D Automated Transmission, Differential Lock, 12350 lb Front Axle, 37478 lb Rears, Meritor MT-40-14X Drive Axles, 2.64:1 Axle Ratio, 49828.0 lb GVWR, Air Ride Cab, 295/75R22.5, Volvo Air Ride Suspension, 178 in Wheelbase, Air Sliding 5th Wheel, Dual Fuel Tanks