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Does this look like "leaky butt"?

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Old Nov 22, 2016 | 07:24 PM
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Default Does this look like "leaky butt"?

Recently noticed a small puddled of differential oil in the garage. I understand the driver's side leak is a typical issue on the C5. Just wondering if you guys that have dealt with this issue can tell anything from this pic. Thanks

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Old Nov 22, 2016 | 08:47 PM
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The '00 I owned had the leaky differential seal three times and I do not recall the oily mess being that high on the differential.
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Old Nov 22, 2016 | 10:44 PM
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I agree with the above. Can you get a pic looking at the sides of the differential?
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Old Nov 22, 2016 | 11:10 PM
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Originally Posted by pgandy
I agree with the above. Can you get a pic looking at the sides of the differential?
Sure, I will post a couple tmrw when I get up.
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Old Nov 23, 2016 | 03:28 AM
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That look like more than one leak.
Had the same issue on my 98, had the diff and gearbox checked and sealed while it was out anyway.
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Old Nov 23, 2016 | 06:03 AM
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What others said
If you can clean it up it would be easier to tell. I would keep "before" pictures for reference.

I could never figure out what that metal piece is on the left. It looks like a counter weight to me.

Last edited by Rob 02; Nov 23, 2016 at 06:08 AM.
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Old Nov 23, 2016 | 09:39 AM
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I will take some more pics then clean it up, drive it a bit, and take a few more.
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Old Nov 24, 2016 | 07:25 PM
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Took a few more pics. This is about the best I could do.

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Old Nov 24, 2016 | 09:05 PM
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Originally Posted by 8VETTE7
Reach up onto the top of the diff on the drivers side and you will feel the vent cap. If there is oil on the top around the vent cap you will know what is leaking. Heat from differential operation causes the diff fluid and air on top of the fluid to expand. Vent cap is prone to sticking closed and allowing pressure to build up inside the housing instead of "venting" the expanded air. When the pressure gets high enough the cap releases and pukes out fluid along with the released pressure. The vent is NOT supposed to allow pressure to build up when it is working properly.
I will check it out and see. What would cause the vent cap to stick and stay closed?
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Old Nov 24, 2016 | 09:54 PM
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Originally Posted by 8VETTE7
Did you read the thread I linked to in post #2???

Explains the issues and has pictures of the factory vent.

Also has some suggested solutions. I have used the short length of hose solution on a couple of cars for members of the club I belong to.
No I'm sorry I overlooked the link. I appreciate the info.
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Old Nov 24, 2016 | 10:06 PM
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Spray the whole thing with brake clean then watch for the leak.
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