Diff. output shaft seal
Thread Starter
5th Gear
Joined: Jul 2009
Posts: 5
Likes: 0
From: Kirkland Washington
Diff. output shaft seal
My 98 is seeping at the output shaft seals. More so on the right side. After I drive it for a while and park in the garage for a few days there is a silver dollar size spot on the floor. Not like a puddle. More like a film. [The floor is epoxied] When I removed the plug to check the oil level there was pressure in the diff. Is this normal or is my vent not working?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
Team Owner
Joined: Mar 2002
Posts: 24,160
Likes: 78
Was that for just the shaft seal or both the shaft and cover? They're both known to weep. That's a fair price for both but way high for just the shaft seal.
Safety Car
Joined: Dec 2004
Posts: 3,526
Likes: 18
From: Santa Fe TX
Mine is doing the same thing. How urgent is it to fix?
It is literally just a dime sized film on the epoxy floor. Not sure I would have even seen it on a regular concrete floor.
I've heard that this can happen after spirited driving from the vent. Will I see more if it becomes a problem? Or will I just end up with an empty (and therefore toasted) differential?
I would rather do clutch, output shaft, seals all at the same time but my clutch is holding for now.
It is literally just a dime sized film on the epoxy floor. Not sure I would have even seen it on a regular concrete floor.
I've heard that this can happen after spirited driving from the vent. Will I see more if it becomes a problem? Or will I just end up with an empty (and therefore toasted) differential?
I would rather do clutch, output shaft, seals all at the same time but my clutch is holding for now.
Team Owner
Joined: Mar 2002
Posts: 24,160
Likes: 78
Define "urgent"
It ain't gonna fix itself, but catastrophic seal failures are very rare. I knew mine was leaking when I bought my car, but I let it go for nearly a year. I did however periodically check the diff. fluid level. What did finally motivate me was the leak went from just being able to "moisten" the cover to actually leaving a tiny puddle on the floor like yours. Seeing that got me off my azz, and I ordered the parts. It took me about 4 hours, but a lot of that was headscratching as I tried to figure out how to jimmy out the cover without removing the halfshaft from the wheel hub.
There isn't much room, but I did finally get it though!
It ain't gonna fix itself, but catastrophic seal failures are very rare. I knew mine was leaking when I bought my car, but I let it go for nearly a year. I did however periodically check the diff. fluid level. What did finally motivate me was the leak went from just being able to "moisten" the cover to actually leaving a tiny puddle on the floor like yours. Seeing that got me off my azz, and I ordered the parts. It took me about 4 hours, but a lot of that was headscratching as I tried to figure out how to jimmy out the cover without removing the halfshaft from the wheel hub.
There isn't much room, but I did finally get it though!
Team Owner
Joined: Mar 2002
Posts: 24,160
Likes: 78
