I have a small leak from the front seal of my 68 Cutlass Jetaway transmission. It's probably because it was in storage for over 30 years and the seal has hardened. I plan to eventually remove the transmission and go through it but in the meanwhile the transmission is operating as it should and I would like to drive my car for a while before tackling that project. Any recommendation or experience with a stop-leak supplement that will not damage the trans and stop the leak until I can get around to pulling it.

 

I would just drive it as is and periodically check and add as required if the leak is small.

 

Put a drip pan under it and keep a check on the fluid.

 

^^ +1. It's hardly worth rebuilding, a TH350 upgrade is a minimum if it has to be pulled. If its the rear seal or speedo gear housing seal leaking, that's easy to replace without removal. Just don't let it run low on fluid, it'll let you know when it does.

 

Already replaced the shift shaft seal and the pan gasket that reduced the leakage significantly so I guess I'll just put up with it and let it mark its territory.