I was looking at my catalytic converter about 10 minutes ago, and I noticed trasmission fluid. I have not driven in in about a week as I am off for school. On the drivers side of the tranny there is a drip coming out what I think is the electronic control module? It is about 8 inches from the back and has a wire coming out of it, two bolts,oval. Dripping, not fast. If i replace this what should I expect, and do I have to drop th pan and drain the fluid to do it?

192,000 on the tranny.