1991 Automatic - Dumping massive amounts of fluid

Hello all. I could use a second opinion before I start tearing into my 91 Explorer... I was towing a trailer today when my tranny started dumping fluid like it was going out of style. It was coming from a slot at the bottom of the trannty where the bell housing meets the engine. I'm thinking front main seal, but this is my first Ford so I don't know them well. Any suggestions/armchair diagnosis' would be appreciated. Thanks in advance.

Matt

well my dads went twice and it was the flywheel both times. it went then the tranny went along with that