pinion seal

[woody31]

hi fellas need some advice,,,,i have a 7.5 inch( i know,,need to up grade),,but right now it is all i got and it seems to be leaking from the front of the diff,,how hard is it to change the pinion seal with the rear end in the car?? How tight do you get the pinion nut?? i have never done this before,,and dont have the money to send it to a shop,,i do have a ft lb,,torque wrench and a inch lb as well....thanks...

 

[Ed Cannon]

Its easy. Use jack stands please. Remove the drive shaft. Mark the pinion nut and the end of the pinion. Remove the nut (it will be tight). Tap off the yoke. Pull the seal. clean everything up good and inspect. Install new seal, this takes a little finesse sometimes. Most important tighten your pinion nut up so your marks line back up an go just a tick past the mark. If you hammer the nut down tight it will most likely kill the pinion bearings. Ive did it this way for years at the shop.

 

[woody31]

thanks for the reply,,so it is do able in the drive way ,,yes?? how,,,what do i mark the nut and shaft with,,,i have a paint stick i use to whiten the letters on my slicks,,will that work,,again thanks for your time and replies,,,

 

[Ed Cannon]

Driveway is fine. Just use a good paint mark that doesnt wipe off when you touch it.

 

[Doober]

I changed mine last year and at first I tightened it down & discovered it wasn't supposed to be tightened. I backed it off until I had friction-free rotation and as little play as possible... should I shoot for a little extra play to account for heat expansion? I haven't driven the car, and the rear was out when I did the pinion (and axle) seals last year.

 

[LS6 Tommy]

Doober, I'm afraid you need to open up the rear, replace the crush sleeve & reset your ring & pinion lash. You almost definitely changed it.

Tommy

 

[Doober]

:? ](*,)

 

[LS6 Tommy]

:? ](*,)

Yeah, I know, but I'd rather be the bearer of bad news than to see a post from you saying your rear was wiped out...

Tommy

 

[Doober]

Indeed... I didn't tighten it very much, just noticed it was tight and backed it off until it moved freely. Plus, if that happened it would give me an excuse to upgrade :lol:

 

[woody31]

anybody happen to have a part number for this seal,,i dont trust the kid at the parts house,,i would rather have the number...thanks