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Transmission Drain Plug Slow Leak
Posted by: mason ()
Date: July 05, 2022 02:47PM

Transmission drain plug is leaking. Much slower leak on the diff behind it. I don't want to overtighten and ruin the threads and get the plug stuck and have to drill it out. I placed red permatex aviation high tack gasket seal around the outside to try as a strategy but it hasn't prevented the leak. Any tips?

BTW, this Corvair leaked on the side cover plate of the transmission and around the oil pan, and around the oil filter and I've got it to the point where I am getting almost no fluid under the car at all minus this issue. Home stretch.

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Re: Transmission Drain Plug Slow Leak
Posted by: mason ()
Date: July 05, 2022 03:14PM

Disregard. Just needed some more tightening.

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Re: Transmission Drain Plug Slow Leak
Posted by: Frank DuVal ()
Date: July 05, 2022 07:51PM

Right, it is an NPT thread, tapered.

Frank DuVal

Fredericksburg, VA

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Re: Transmission Drain Plug Slow Leak
Posted by: caroseiii ()
Date: July 07, 2022 10:39PM

Sometimes a new plug solves the problems caused by rust or poor fit.

C.A. Rose
Metairie, LA
1962 Spyders

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Re: Transmission Drain Plug Slow Leak
Posted by: Vairismo ()
Date: July 08, 2022 12:13PM

GM used the 'seal - tite' type thread form on their plugs. Make sure you have the original type threaded plugs.

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