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Discussion Starter · #1 ·
Is this seal an O-ring? The guy at NAPA said that he thought it was an O-ring so I grabbed one of those but I wanted to make sure before I put it back on. Also, is there any sealant or anything that should go on the threads of the adjustment screw?

TIA,
Brian & Dad
65 coupe
69 coupe
 

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The seal is a molded in part of the adjustment nut, not a seperate seal.
Regards,
 

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Although I prefer to use the OEM-style nuts with the bonded seal, I did modify a couple worn-out ones for use with a silicone o-ring as an emergency measure in my pit box for the race car.....I tend to use what I have since I can make most anything *G*.

Because the seal works against both the case and thread pitch, it needs to be compliant....normal Shore 70 o-rings are too rigid and IME get cut on the threads where a low durometer silicone o-ring is more conforming and flexes rather than cuts... I believe the seal in the OEM nut is silicone-based but am not positive.

When possible, I prefer to use new OEM-style nuts...any trans shop or wholesaler will have them, likely along with select auto parts stores...

Since the adjuster screw runs in aluminum threads, I like to use little ATF on the threads when screwing it into a dry case....the threads are wetted once the trans is running but I just don't like a stuck or pulled thread (possible in aluminum)....
 
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