Just removed the trans from the engine. As I had the engine/trans assy halfway removed from the car, and had it tilted, oil came out from the top of the trans, and I believe the source was the slotted hole (see picture below). I had just purchased this car and someone (jiffy lube) had waaaaay over-serviced the oil, to the point that it smoked extremely badly and lost a lot of power. Once I drained it to the appropriate level it behaved beautifully and didn't smoke. Yaay.
Second question: how do I get the bell housing off? Just get a big pry bar and pop it off? I don't see any bolts..