My wife granted my some driveway time sunday so I started my investigation.
Mant pictures when I figure out where to post them.

I drained out the final drive this weekend. !Five quarts! Dark red, no sign
of anything like coolant contamination. Pulled the bottom cover off, looked
okay in there. In retrospect I wish I had used permatex to put it back on,
this is not the flattest cover I have ever seen. The cork gasket
disintegrated (original?) and took a lot of scraping to remove completely.
Some steel fuzz on the magnet, some small metal flakes in the sump, nothing
terrible. Ring gear looks good. This gear, and the pinion, were the most
memorable parts to my five mechanics assistant. All the external leaking
seemed to be coming exclusively from the vent at the top, none from the hole
behind the ATF pan. This hole looked clean, no seepage or apparent blockage
although I didnt try to probe up there. Maybe this means I am lucky and
replacing the governor seal will fix it. That will have to be next weekend,
the multivan gets me to work.

Robert
90 MV