Speedo Gear Reduction Adapter

[TDR]

I have a Stewart-Warner speedometer gear reduction adapter on my '54 Chevy truck that has been slowly leaking transmission fluid. It was present on the vehicle when I purchased it. After removing it I expected to find worn out O-rings on the two connection sites but none were present. Is that normal?...are O-rings not used in this application? If not, should some type of thread sealer be used on the connections when I re-install it? I have included several pics of the speedo adapter: one where it is installed and leaking, the remainder are of the unit after removal. Any help or suggestions would be much appreciated.

[geezer#99]

The leak originates in the small oring inside the speedo bullet. THe atf tends to migrate thru the adaptor and up the cable. THe driven gear wears it out.
Here's a new bullet with the small oring. You can buy them seperate but likely easier to get all new.
http://www.classictransmissionsoluti...ter-turbo-350/

Your local tranny shop should have them. Common item.

[TDR]

geezer#99...thank you very much for your reply. I'm going to order the new bullet kit from the site that you forwarded to me. Again, thank you sir!

[geezer#99]

Or from these guys. They're quick.
https://transmissioncenter.net/shop/