Transmission pan leak
 

Changed the pan gasket on my 2-spd transmission on my '64 GTO. Torqued it very lightly at first. Still leaked. Retorqued to about 30 in/lbs. Still leaking. Have heard not to over torque bolts so going lightly at first. What is a good torque on the pan bolts?

8-12 ft/ lbs

Very possible the leak is coming from elsewhere and just collecting around the edge of the pan. They leak from the dipstick tube and from the front pump seal quite often.

Plus the linkage seal and the electrical connector.

The guys above covered it!

When I receive my 65 GTO from the Original owner about 5 years ago, they informed me that the transmission was leaking bad.

I installed a new pan gasket with proper torque on the bolts and I still gathered ATF around the edge of pan.
Turns out it was coming out of the “O” ring on the downshift solenoid sending unit. Pain in the Arz, but leak got fixed.

This plastic switch is real fragile so beware.

Chris.

Thanks for all the help guys! I'll keep you posted on progress!

Yep, 90% chance you will find it to be the kick down solenoid. Chased my leak for years before finding the culprit.

So how was this leak from the downshift solenoid fixed?

It´s not the solenoid itself that leaks, look at the kickdown wire connector that sits on drivers side having an O-ring needs to be replaced.
Drop the pan so you can release the plastic "hooks" from inside to pull the connector.

I just yank the old connector out (don't drop the pan)
and replace it with a new one as sometimes they are cracked where the blade goes through.

vwalburn,

I have literally done exactly what Kenth is saying.

You don’t just yank a plastic solenoid out.
There are plastic clips (hooks) on the inside to secure this unit. The pan needs to come off along with the ATF metal filter to have access to the old O-ring.
There is another wire clipped to the opposite side of solenoid inside the pan as my photo shows, so use caution.

It says this in the Pontiac Factory Shop Manual......drop the pan for service on solenoid.

You may want to consult an old school transmission shop for their suggestions.

Anyway, good luck as this method work for me recently.

Chris.

Right you are! Leaking right from the electrical connector. I have a new o-ring for the connector and will be working on it today with all this social distancing! Perfect time to catch up on some GTO stuff!

No more leak!
 

Leak is fixed with the new o-ring on the case connector for the downshift solenoid! Thanks for all the info guys! Couldn't have figured it out as quickly without you!

Sometimes the connector is cracked where the blade comes out

You get stuff done about as fast as I do. No rush anyway as long as she is a runner.

You know, plan on working on GTO but Life has other plans for a while. Finally got to it and it's leak-free. Nothing in the drip pan for the first time in a long while.

Take solace, you solved it way faster than I did. Mine took me years to figure out. However, I did not have the huge pool of experts to tell me what was the culprit.
The internet is so amazing. One can query any problem on the internet and there will be someone out there who has been there and done that. Now, any time
I have a problem with anything, I just Google it. However, there are a lot of dumblefumples that like to run their mouths when they really know nothing. Once you
learn to recognize these types you can just move on. I will say that here we tend to have some people with really superior knowledge regarding our Pontiacs.