NSBU leak - Chevy and GMC Duramax Diesel Forum
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post #1 of 7 (permalink) Old 11-09-2011, 06:12 PM Thread Starter
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NSBU leak

I recently installed a new nsbu switch onto my stock alison. It appears to have a small leak in same general area of switch. I havent pulled the switch back off yet but if anyone has any ideas any sort of input would be greatly appreciated.
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post #2 of 7 (permalink) Old 11-10-2011, 09:18 PM
Oh...... Squirrel!
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I never seen one leak. Can you post a pic?

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post #3 of 7 (permalink) Old 11-11-2011, 06:04 AM
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Probably the selector shaft seal--

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post #4 of 7 (permalink) Old 11-11-2011, 06:12 AM
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^ thats what I would say too. Not much else there except that seal or the pan gasket.

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post #5 of 7 (permalink) Old 11-16-2011, 03:32 PM Thread Starter
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seems to be coming from above the sensor now out of sight. need to get a mirror on it tommorow. thanks forn the help though.
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post #6 of 7 (permalink) Old 11-16-2011, 03:42 PM
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Sounds like you are overfilled. Check overflow on top of trans case.
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post #7 of 7 (permalink) Old 11-25-2011, 04:16 PM Thread Starter
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must of been the over flow, hasnt leaked since.

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