F350. Left.F250 HD. Right.F250 HD. 12 x 3" Rear Brakes. 4,600 Lbs. Front Axle. Bearing Only. Drive Axle Shaft Bearing. Dual Rear Wheels. Exc.4,600 Lbs. Front Axle. Full Floating Axle. Heavy Duty Towing Package. Part should be ordered by gear ratio. Ring Gear 10.5". Ring Gear 10.80. Ring Gear 10.80". Ring Gear 11.25". Single Rear Wheels. To 11/11/2011. To 12/01/2011. Wheel Bearing. Cone and Roller -. Drive Axle Shaft. Inner. Outer. Wheel. Included with: Hub assembly.