Hub Reduction Bearing - Ball Bearing. This is the original ball bearing found on the Rear Axle, Upper Inner on the late 406/416/419/435 axles. It is likely your truck was originally equipped with this bearing. In later production, MB superceeded this bearing to a Cylindrical Roller Bearing (0109813501) EI sells both bearings. The ball bearing version was used for decades and is a much more cost effective option.
NSN 3110-12-303-5845
