it doesnt matter the depth, the crank is the same diameter in that spot, so it wouldnt matter. It gets a groove fro running in one spot for 200k, then you go pyut a new seal, when the seal wasnt even bad, it just had a gap because of a groove. You need to make the seal ride in a different spot, so its not sitting in the groove. Or a speedi sleeve, but I hate those things and never have good luck with them.
