I am refering to the berring assemblies that go in the rear end that replaces the stock berrings if they have gone bad and damaged the berring contact surface of the axel. They have the berring seal on the inside, and are lubed with moly and press in as an assembly. I work in a shop and have put a few in latley, and I'm just wondering if anyone has had any reliability problems with them? No that I have, yet, but I'm worried about them becoming a comback. I perfer just installing another axel. I put one in a 8.8 in a E150 today.