a drip off the bottom of the bellhousing is almost certainly a pump seal leak, or possibly pump bolts or the pump o-ring. Either way you're gonna need to remove the trans to ID the leak and address.
I'm 50/50 on getting the seal out without needing to remove the pump. But that's probably because I'm comfortable removing the pump if need be. If I weren't comfortable with that, I would probably be a lot more motivated to get the seal out with everthing still assembled.