Pinion seal leak
Thread Starter
Pro
Joined: Jun 2016
Posts: 567
Likes: 82
From: Auckland
Pinion seal leak
The pinion seal on my '81 seems to be leaking, so I want to replace it. I've found threads saying this can be done without removing the diff. I have yet to see something from someone saying that they have done it while the diff is still in the car.
Is it easier to remove the diff and then do it? (if i go with this option I would look at doing more than just a seal)
I do not have access to a lift.
Is it easier to remove the diff and then do it? (if i go with this option I would look at doing more than just a seal)
I do not have access to a lift.
Drifting
Joined: Apr 2010
Posts: 1,857
Likes: 332
From: Cartersville GA
I dropped the differential in my 72 to do the seal.....But I had everything else out at the same time rebuilding the trailing arms....The seal is tricky to get back in correctly and if I had to do it again I wouldn't even attempt to do it while still in the car. That said I have read where others have successfully done it without dropping it.
Good luck...
Brian
Good luck...
Brian
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,853
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
The pinion seal on my '81 seems to be leaking, so I want to replace it. I've found threads saying this can be done without removing the diff. I have yet to see something from someone saying that they have done it while the diff is still in the car.
Is it easier to remove the diff and then do it? (if i go with this option I would look at doing more than just a seal)
I do not have access to a lift.
Is it easier to remove the diff and then do it? (if i go with this option I would look at doing more than just a seal)
I do not have access to a lift.
Things to know about this job is that it's very easy to mistake which direction the new seal goes.... put it in backwards and it'll still leak. (We had a customer install 2 backwards before bring us the car). And unlike the prior years 1963-1979 where you need to count the turns it takes to remove the pinion nut, your rear end is a Dana and doesn't have a crush sleeve inside so you just torque it down.
Willcox
Melting Slicks
Joined: Feb 2004
Posts: 2,111
Likes: 32
From: Damascus MD
I've done it without removing the rear end, but it's not easy and you'll probably need a lift to do it.
Things to know about this job is that it's very easy to mistake which direction the new seal goes.... put it in backwards and it'll still leak. (We had a customer install 2 backwards before bring us the car). And unlike the prior years 1963-1979 where you need to count the turns it takes to remove the pinion nut, your rear end is a Dana and doesn't have a crush sleeve inside so you just torque it down.
Willcox
Things to know about this job is that it's very easy to mistake which direction the new seal goes.... put it in backwards and it'll still leak. (We had a customer install 2 backwards before bring us the car). And unlike the prior years 1963-1979 where you need to count the turns it takes to remove the pinion nut, your rear end is a Dana and doesn't have a crush sleeve inside so you just torque it down.
Willcox
Hmm - What a novel idea. Counting the turns on the nut. Do you even use a torque wrench?
Min is a 70 and is leaking and spewing gear oil everywhere. It is killing me as I just finished getting everything back together rand aligned. It did not leak before sitting for 2 year sand now what a mess.
Sorry to hi jack the thread but I am almost distraught at having to take apart the back end. Everything is detailed, plated and as new.
Thanks, Bill
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,853
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Hmm - What a novel idea. Counting the turns on the nut. Do you even use a torque wrench?
Min is a 70 and is leaking and spewing gear oil everywhere. It is killing me as I just finished getting everything back together rand aligned. It did not leak before sitting for 2 year sand now what a mess.
Sorry to hi jack the thread but I am almost distraught at having to take apart the back end. Everything is detailed, plated and as new.
Thanks, Bill
Min is a 70 and is leaking and spewing gear oil everywhere. It is killing me as I just finished getting everything back together rand aligned. It did not leak before sitting for 2 year sand now what a mess.
Sorry to hi jack the thread but I am almost distraught at having to take apart the back end. Everything is detailed, plated and as new.
Thanks, Bill
On a Dana 1980-1982 you torque the nut down, there is no crush sleeve inside.
Willcox
Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,853
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Nice.. just pop the cover off when you have it on the bench... pull the snap rings.. and remove the side yoke seals. Not a hard job at all on the bench. But make sure you check the side yokes to make sure they are not worn too. The picture below will show you what to look for.
If the ware is moderate on the right side, then swap the right with the left and go on. The right side usually shows way more ware than the left but it it's minimal you can switch them out without any expense.... If the yoke is wore considerably then replace it.
If the ware is moderate on the right side, then swap the right with the left and go on. The right side usually shows way more ware than the left but it it's minimal you can switch them out without any expense.... If the yoke is wore considerably then replace it.
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Former Vendor
Joined: Aug 2006
Posts: 76,656
Likes: 1,853
From: Jeffersonville Indiana 812-288-7103
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15
Diff is out. I'll need to give it a good clean before I think about opening it up. There also seems to be excessive play in the passenger side yoke. I'll know more later.
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Thread Starter
Pro
Joined: Jun 2016
Posts: 567
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From: Auckland
Racer
Joined: Sep 2014
Posts: 421
Likes: 34
From: Troy Michigan
Revive...
Hello all!
My diff was leaky and I removed the drive shaft! What I found surprised me. The rear flange was completely missing... and I seemed to have damaged the seal P.N S7208. I cannot for the life of me find a replacement...? Does anyone know where I can get one? Does the flange replace this... hmm any help is appreciated!