Rr axle oil seal
Thread Starter
Racer
Joined: Mar 2013
Posts: 251
Likes: 9
From: Western Massachusetts
Rr axle oil seal
We were told by a dealer that we need a rear axle oil seal on our 99 FRC. I remember reading on this forum that the actual problem is not always a leaking oil seal. It could be something much simpler. I don't remember exactly what the simpler was; however, it wasn't the oil seal. Could someone please tell me the possible alternatives?
Thank you in advance.
Thank you in advance.
Melting Slicks
Joined: Dec 2018
Posts: 2,677
Likes: 1,397
From: Orange County, CA
Not sure if this is helpful, but I had a little experience with a persistently leaking diff.
As part of a diff LSD rebuild I replaced both side cover O-rings and both axle seals. Ultimately this didn't stop the leak on the passenger side, so I replaced the axle seal again. Still leaked!
Longer story short, my diff will leak when there is a vent valve in place. If I replace the vent valve with a breather line instead then the leak ceases.
In case you are interested in following my saga, you could start reading here: https://www.corvetteforum.com/forums...post1603053708
Another source of info: https://www.corvetteforum.com/forums...tial-vent.html
In general, the diff vent valve's rubber diaphragm can become concave over time and stop allowing the diff to vent properly... thus enabling excess pressure buildup that can result in a fluid leak.
Even after replacing the valve on my diff it still leaked.
I can't find info on it right now, but I recall there may have been a GM TSB to replace the vent valve with a hose for people with persistently leaking diffs.
As part of a diff LSD rebuild I replaced both side cover O-rings and both axle seals. Ultimately this didn't stop the leak on the passenger side, so I replaced the axle seal again. Still leaked!
Longer story short, my diff will leak when there is a vent valve in place. If I replace the vent valve with a breather line instead then the leak ceases.
In case you are interested in following my saga, you could start reading here: https://www.corvetteforum.com/forums...post1603053708
Another source of info: https://www.corvetteforum.com/forums...tial-vent.html
In general, the diff vent valve's rubber diaphragm can become concave over time and stop allowing the diff to vent properly... thus enabling excess pressure buildup that can result in a fluid leak.
Even after replacing the valve on my diff it still leaked.
I can't find info on it right now, but I recall there may have been a GM TSB to replace the vent valve with a hose for people with persistently leaking diffs.
Le Mans Master
Joined: Jul 2010
Posts: 6,021
Likes: 727
We were told by a dealer that we need a rear axle oil seal on our 99 FRC. I remember reading on this forum that the actual problem is not always a leaking oil seal. It could be something much simpler. I don't remember exactly what the simpler was; however, it wasn't the oil seal. Could someone please tell me the possible alternatives?
Thank you in advance.
Thank you in advance.
