Writeup for a pinion seal replacement?
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Joined: Nov 2001
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Re: Writeup for a pinion seal replacement? One of the SLP engineers added this during a discussion of pinion seal replacement.
"GM made a change to the pinion seal design some time during production that should have fixed the leak problem. When the dealer changes the pinion seal ( if they do, make sure they use a new crush sleeve - some don't to save money/time. if they don't change it,chances are it'll just leak again)."
"GM made a change to the pinion seal design some time during production that should have fixed the leak problem. When the dealer changes the pinion seal ( if they do, make sure they use a new crush sleeve - some don't to save money/time. if they don't change it,chances are it'll just leak again)."
Re: Writeup for a pinion seal replacement? The most important thing to do with a crush sleeve rear is to mark the pinion nut so you can tighten it exactly to where it was before you started. If too loose, it will leak, too tight and it can wipe out the bearings. I take a dremel and cut a small slot so I can get it back exactly in the same place or just a tiny bit tighter. Works 99% of the time if it was set up OK in the first place..
You do not need to remove the pinion to replace the seal, its a 30 minute job at most on a lift.. Take out the driveshaft, mark the nut, take off the nut (big impact works real well there
), pull off the yoke, pop the seal out, install the new seal carefully, assemble in reverse order, its pretty east to see where the nut will have to be in relation to your mark when it starts tightening, check/fill the diff and your done.
You do not need to remove the pinion to replace the seal, its a 30 minute job at most on a lift.. Take out the driveshaft, mark the nut, take off the nut (big impact works real well there
), pull off the yoke, pop the seal out, install the new seal carefully, assemble in reverse order, its pretty east to see where the nut will have to be in relation to your mark when it starts tightening, check/fill the diff and your done. 
