
I was sorta expecting a pic of your 10 bolt with a new custom windowed cover. A cover leak is a bit of a let down...![]()
Oh, I hope it holds together for a bit longer while I save some bucks!
If the pinion isn't loose already, it's replacing the seal, and hoping you can get the pinion bearing pre-load just right. Lots and lots of posts on how to do this. Basically on a used crush sleeve, it's luck.
GM book-method is measure the *in-lbs* required to turn the pinion first, then do your work, reassemble, then torque a couple more in-lbs than you started with.
Mark the nut that holds the yoke
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You have autozones out there? Might check with them, see if they have an in-lbs wrench you can borrow. I can't recall hearing anyone that has actually followed the GM procedure.
I've done it the "wrong" way a fair number of times without issue, but the last time on a 10 bolt, and it didn't go back together right. Gears howl, I didn't drive it any after hearing that.
I wonder if the lift kit shortened it's life, or if it was just time for it to screw the pooch.

If you want you can bring to my shop. Message with number. On cell now. Cannot type for crap.
Some guys have had success counting threads exposed, removing the yoke, replacing the seal, re-installing the yoke and tightening the nut carefully to the same depth that it was.
I've had good luck just replacing the seal.
Martin