Thought it was leaky pan but now...

48james said

I had this same thing happen with mine! I dropped the trans for it and once it was in we found it hadn't gone in right, so that was a pita doing it while in! It still has that leak however on the pan, it has been replaced a few times what do you think it is? I think the pan is just screwed because it is bent a little but maybe the seal could be wrong too?

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Get the bonded rubber with a steel core pan gasket, and done deal.
You can find it as a 42RE trans pan gasket at the dealership.

Of course a straight pan helps a lot. :D

Also, just in case you didn't know there is a cork gasket under a small cover right under the trans mount on the bottom of the tailhousing that can leak just like the cork pan gaskets.
Then there is also the rear servo lever pivot pin in the lower back of the case just above the pan rail.
It has a groove around it with an oring on it that you can't see, and that can also leak and look like a pan problem.
The only real way to fix that one is to drop the pan and push it out of the case, and the extension housing has to be unbolted and at the very least twisted around a little to expose that pin so it can be pushed out from the inside.