Volvo D13 6 Cylinder Diesel 455 hp Engine, Requires Diesel Exhaust Fluid, Differential Lock, 12500 lb Front Axle, 38000 lb Rears, Meritor RT-40-145 Drive Axles, 3.21:1 Axle Ratio, 50500 lb GVWR, Air Ride Cab, 61 in High Rise Sleeper Cab, Bunk Beds, Aluminum Wheels, 295/75R22.5, Air Ride Suspension, 230 in Wheelbase, Air Sliding 5th Wheel