When doing a seal replacement on my half tons, I have to use a seal puller because the stubborn things get stuck in the axle housing. I also have a set of proper seal installation tools (pretty important, but the right diameter of socket should work)to put the new seal in with. I watch the installation of the axle shaft with that delicate rubber sealing lip. I never touch the bearings unless there seems to be a lot of play. My 78 needs bearings now. There is a noticeable click I hear when at lower speeds.
This is a 9", semi-floating type as well. The Dana is the full floater, and the bearing is in a different place, and not on the axle shaft...
Mark
Mark


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