Pinion seal replacement???
Thread Starter
Melting Slicks
Joined: Nov 2005
Posts: 3,323
Likes: 142
From: Green Valley Arizona
Pinion seal replacement???
Now that I get to actually drive my 81, looks like the pinion seal is leaking.
Is this something I can replace without taking the differential out or is it time to do a complete rebuild of the differential?
Thanks,
LannyL81
Is this something I can replace without taking the differential out or is it time to do a complete rebuild of the differential?
Thanks,
LannyL81
Melting Slicks
Joined: Nov 2001
Posts: 2,668
Likes: 43
From: Eastern US XX
Originally Posted by Twin_Turbo
No, the alu diff has the pinion mount cast in and that prevents access to the seal & yoke, you have to take it out. Taking it out isn't that hard though and a good time to replace any worn bushings.
I thought you could - hmmmm....
Race Director
Joined: Dec 1999
Posts: 16,945
Likes: 9
Seriously ... you can't!
It's the one on the right. Now imagine the whole area surrounded by the frame and the driveshaft tunnel between the 2 storage boxes. I have tried it, there just is no way to work in that confined space to get to the yoke
It's the one on the right. Now imagine the whole area surrounded by the frame and the driveshaft tunnel between the 2 storage boxes. I have tried it, there just is no way to work in that confined space to get to the yoke
Last edited by Twin_Turbo; Jun 23, 2006 at 11:42 AM.
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Take it out!
Originally Posted by Twin_Turbo
No, the alu diff has the pinion mount cast in and that prevents access to the seal & yoke, you have to take it out. Taking it out isn't that hard though and a good time to replace any worn bushings.
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Race Director
Joined: Dec 1999
Posts: 16,945
Likes: 9
Wow, you actually managed to get it done like that? That's increadible. Did you mark the pinion, nut and shaft to get it all lined up properly after torqueing it down? I had a hard enough time to get the driveshaft off...getting at those little bolts was a PITA and them being 12 points didn't help either.
Tech Contributor
Joined: Jun 2004
Posts: 20,850
Likes: 959
From: I tend to be leery of any guy who doesn't own a chainsaw or a handgun.
Originally Posted by dwncchs
I have done it both ways on both diff. and you will be much happier taking it out.It is extremly hard getting the nut loose because of the lenght of extension needed.When you put it back you run the risk of crushing the sleeve too much like has been mentioned.Plus its a good time to clean and paint and inspect other things while their out.
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Originally Posted by Twin_Turbo
Wow, you actually managed to get it done like that? That's increadible. Did you mark the pinion, nut and shaft to get it all lined up properly after torqueing it down? I had a hard enough time to get the driveshaft off...getting at those little bolts was a PITA and them being 12 points didn't help either.
Race Director
Joined: Nov 2000
Posts: 11,872
Likes: 12
From: Waterloo ontario Canada
Originally Posted by swensonm
So on a 74 you could correct?
Mike
Mike
Yes on a 74 with a homemade tool you can install pinion seals. Doug/carguy4sure borrowed it for his 78 and couldn't believe how easy it was.
Safety Car
Joined: Jun 2004
Posts: 4,364
Likes: 221
From: Beecher Illinois
Replaced the seals in both of my 79s. Didn't have any problem getting the old seals out or the new ones in. My handy dandy tool (below) and a 3' pipe on the breaker bar made breaking the nut loose and tweaking it back on to my scribe marks easy.
Used 1/8" X 1 1/4" X 36" angle iron($5). Space the holes so that it snugly cradles the flange and bolt it on.
Used 1/8" X 1 1/4" X 36" angle iron($5). Space the holes so that it snugly cradles the flange and bolt it on.
Instructor
Joined: Feb 2005
Posts: 134
Likes: 5
From: North Ga
Been there done that
http://forums.corvetteforum.com/show....php?t=1093346
Check above link. Chg seal last summer takes some time but it worked.
Good luck!!
Check above link. Chg seal last summer takes some time but it worked.
Good luck!!
Instructor
Joined: Feb 2005
Posts: 134
Likes: 5
From: North Ga
https://www.corvetteforum.com/forums...tial-seal.html
Check out this link (it worked for me) definitely doable without a lift
Important to record torque prior to removal.
Check out this link (it worked for me) definitely doable without a lift
Important to record torque prior to removal.
