More background until I can test where the fluid is coming out...
A "mechanic" at a marina knew that the dipstick was missing from the transmission -- you know, the dipstick with the pressure vent hole in it. So he inserted a plastic cork into it. He used the type of cork that has a lever to lock it down tight.
I found the dipstick and replaced it, but the damage was done. I believe this is the cause of the drip, that is blew-out a seal or gasket
Otherwise the transmission works fine.