I have what appears to be trans fluid leaking near the throttle body collecting on the manifold? The kick down cable seems like it has this fluid on it as well.

Always been dry in the past, is this something someone else has ever experienced?

 

Interesting... My thought is the torque converter is leaking back into the transmission when the vehicle sits. The torque converter holds something like 6-8 quarts, and the transmission pan only has room for maybe an extra quart.

That's all I got. No input on fix or how to verify that is the issue. Hopefully gives you something to research.

 

Perhaps the vent tube is blocked or kinked.

 

I don't think it could gravity feed up, however Steve what you said makes since, could be increased pressure. I'll check the Vent Tube.