[JohnC]

I have a tranny leak (or multiple leaks). One obvious source was the speedo cable. I know there is an O-ring around the speedometer gear housing. This looked pretty good but I changed it anyway. Are there any other seals or O-rings that need to be changed? Is there anything that goes between the cable and the gear housing to prevent leaks (or should a sealer or teflon tape be used on the screw-on ring?). Thanks in advance.

 

[Guest]

What kind of trans are you working on? If it is a Muncie then no sealer is required for the speedo cable, just the o-ring on the gear holder.

 

[CY72SS]

I had a seal in the speedo gear housing that was leaking. It's in the end of the housing by the threads. The speedo gear shaft goes through it (where the square cable goes in). I don't think all speedo housing had this. I had a hard time finding one. Ended up getting one from: http://www.gearzone.net/

 

[JohnC]

Sorry Wally, it's a TH350. My concern it that this is a fairly significant leak and that the o-ring on the outside of the housing looked good. I'll check to see if there is a seal inside to keep fluid from leaking around the nylon gear shaft. Thanks

 

[Guest]

Turbo 350 and a Muncie use the same deal. The thing that the driven gear fits into and plugs into the trans is called a sleeve, It has a rubber O-ring on it and if it is old it could be leaking.

 

[70L34]

John, had the same thing happen with my Caprice's T350 when I was back in town a couple weeks back. Call Hipster Trans in Germantown and bring your speedo gear housing into them. They took out my old O-rings and installed two new seals (stock is only one seal). All for $5, can't beat it. Best part is no more leaks. And it had been leaking a LOT, to the extent that the trans wouldn't even go into gear.

------------------
Tony Nausieda
1970 SS 396-4??hp
Frame-off Resto, just painted, awaiting final reassembly.
NOT stock but looks it!

 

[JohnC]

Thanks for the advice. I'll give it a try.