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New Output Shaft Seal Leaking

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Old 05-17-2012, 11:37 PM
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Default New Output Shaft Seal Leaking
I just put in a built T56 and the output shaft seal is already leaking. The seal was brand new from Tremec. The seal has a small visible gap between it and the slip yoke. Is this normal? It's almost like the ID of the seal is too large. Is there a seal out there with a smaller ID that will actually seal against the slip yoke?
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Old 05-18-2012, 04:51 PM
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Old 05-18-2012, 08:10 PM
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Yeah the seal that comes on the Tremecs go bad real quick. Mine starting leaking too. Check out D&D performance for an upgraded seal. I think the part# is BB80... It has a steel body and is much better than what Tremec slapped in there... http://www.ddperformance.com/
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Old 05-18-2012, 09:58 PM
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I use a National seal and almost never ever have an issue. Your bushing in the tail housing might need to be replaced as well.
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Old 05-19-2012, 02:03 PM
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Originally Posted by thesource
I use a National seal and almost never ever have an issue. Your bushing in the tail housing might need to be replaced as well.
The bushing was replaced.
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Old 08-01-2012, 07:27 AM
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Originally Posted by thesource
I use a National seal and almost never ever have an issue. Your bushing in the tail housing might need to be replaced as well.
Can I ask what number is on the national seal? I just got one from GM $42!!
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Old 08-01-2012, 08:33 AM
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Good news is you dont have to yank the transmission to replace it
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Old 08-01-2012, 09:56 AM
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That seal has several sealing lips and an outer stone shield. The gap you see isin that outer stone shield . It should not contact the yoke.
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