I communique'd with the seller and I think we have it narrowed down to the Neutral Indicator Switch Seal. I got some light in the area I lovingly call "the cave" (in between the shelf and tranny), and everything is dry. But I noticed the wire and black plastic harness that is to the left of the greased up NIS seal was glistening and the greasy mass had some oilyness to it. I carefully cleaned the wire off without disturbing the grease, and fired up the engine to run a bit. But no leak. I'm going to check again before I go to work tomorrow and take a white paper towel with me. If I see oily stuff on that wire again, I'm going to wipe to see if it is oil. This has a ceramic housing that seals against copper, so they eventually leak.