It never ends. Leaky selector shaft seal.

Some had an O ring and some had a little rubber seal kind of like the speedo pinion uses only larger.
Probably not a pressure or vent issue since it did it sitting.
Sure could see a lot of fluid around the base of the selector shaft though.

He probably has it fixed by now.:D

I think I have it fixed.
To answer 67Dart273's question, its been leaking a nice size puddle every day just sitting in the garage so doubt it has anything to do with pressure or venting.
This one has no o-ring, just the selector shaft seal, and a small rubber seal at the top that seals around the throttle pressure lever shaft (replaced that too just for the hell of it), but it really was seeping up around the selector shaft.
Anyway, changed out the seal yesterday, cleaned everything off really well, let it sit 24 hours and it's dry try as a bone. So I just finished putting everything back together. Put all my tools away, swept up around the car. Got ready to fire it up, and I Can't Find The KEYS!

Arrrrrgggg, I can't believe it, I've looked everywhere and no sign of them. There on a separate key chain from my other stuff.