I'm doing a ball joint, bearing, and seal R&R on my K5 and I can't find a part number I need. When you remove the spindle nuts (outer, lock ring, inner) and pull the hub, there is a metal cup that covers the outer wheel bearing. The locking hub spring rests on this cup and the outside of the cup rests on the outer wheel bearing cage. The cup is around 2 7/8" in outer diameter and is 1/4" thick. Does anyone know the part number? Is this cup included when you buy a new outer wheel bearing? Maybe the PO put this cup in the wrong place? On a different note, the PO must have replaced one of the spindles with a 10 bolt at some point. My K5 has one small bearing spindle and one large bearing spindle.