Quote:

Another vote for over full and coming out the front vent.
First it says
"727 Deep pan provides an additional 2-4 quart capacity, significantly improving the cooling ability of the fluid."

Usually 2 more is more like it and if you put a higher stall they hold less. when car sits torque drains back and makes it real high and leaks out vent and down front of tranny right to the pan.





Its impossible to come out the vent when sitting. It would take several gallons to even get it close to the shaft centerline let alone the vent hole.

Leak is most likely dipstick or shift shaft seal,