speedometer gear pinion housing

[Russ Austin]

I solved the leaking speedometer gear leak on the transmissions. If you take the housing out of the tranny, and remove the pinion gear and shaft, there is a O ring in the housing. Pop it out with a dental pick, and size it up at the parts store. I installed the new O ring in less than a minute.   One less leak to worry about.

[Gérald Fourdin]

Ok thanks for info !

[Russ Austin]

I dont see a need to drain the tranny. Just run the engine for a few minutes, just in case the tranny has internal leakage (good call David).  Have a catch pan ready, just in case.  

[Gérald Fourdin]

Hello, I sometimes lose my oil Turbo Hydramatic TH-400 transmission. Also known as the small O-ring that is in question. I would like to place a new O-ring, is work hard, should we drain the transmission oil? Thank you for your

[David Thomas]

This is a fix you can do on the 63 Hydra-Matic without loosing fluid. Unless all the fluid is in the bottom of the transmission from internal leakage. The shift linkage O-rings are another source for external leakage. Unfortunately, you have to drop the pan to get at those.

Good Post Russ, The spedometer drive was a pesky leak I eliminated on my 63's transmission, also.

 

[Jason Edge]

Good information. I put a link to this thread on the Help Topics Page.

[Russ Austin]

Tony, the fix is for the Hydra-Matic tranny.  Should be the same for the Turbo.   I pulled the piece out of my parts transmission,  so I dont know if the tranny will leak when pulled.

[Tony and Ginny 429]

Russ

which trans does your fix apply to  ?

i think your 63 has a hydromatic

did you have any issue with trans fluid leaking out during the repair ?`