Leaking issues in my 200 4R - any gurus available?

I don't know that it is getting hot. Art Carr seems to think it is and is pushing out the vent. It's coming out the vent, but I don't know why. It shifts perfectly, so I don't believe there is anything wrong internally. Transmissions work best at @ 165 degrees. Plus, liquid to liquid cooling is way more efficient than air to liquid.