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Leaky Butt???

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Old Apr 13, 2014 | 09:45 PM
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Default Leaky Butt???

This is odd. My Z has diff fluid leaking from the bottom of the diff in the center. It starts about a .25 inch in front of the diff drain plug and runs towards the back covering all the letters (GETRAG) on the diff. The drain plug is tight. Just started. The left and right diff covers are dry. Any ideas?
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Old Apr 13, 2014 | 10:43 PM
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very very common on a C5, The seal on the diff covers were defective from the factory. Search for your very terms "leaky butt" here.
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Old Apr 13, 2014 | 10:50 PM
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Originally Posted by baxsom
very very common on a C5, The seal on the diff covers were defective from the factory. Search for your very terms "leaky butt" here.

A number of great posts and an excellent DIY thread.
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Old Apr 14, 2014 | 03:12 AM
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Did either of you read the original post or am I misunderstanding you? Leaky butt comes from the sides of the diff and the OP claims they're dry. My leaky butt came from the sides of the diff. OP is your case cracked by chance? I'd take a good, hard look.
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Old Apr 14, 2014 | 08:27 AM
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Originally Posted by Supercharged111
Did either of you read the original post or am I misunderstanding you? Leaky butt comes from the sides of the diff and the OP claims they're dry. My leaky butt came from the sides of the diff. OP is your case cracked by chance? I'd take a good, hard look.
No cracks some casting flash. I put in on the hoist last night and cleaned the entire case looking for cracks. I haven't heard of the cases breaking in stock cars. Is cracking somewhat common??
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Old Apr 14, 2014 | 08:31 AM
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is it coming out the breather?
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Old Apr 14, 2014 | 09:03 AM
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Scrub it down completely so that all of the oil traces are gone and then check it every day or so until you see exactly where it is coming from. The traditional failure point is the left side cover.
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Old Apr 14, 2014 | 09:15 AM
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Don't know if leaking from vent.
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