OK, Here's the deal. 1988 M5. The oil is leaking right at the rear of the trans. I thought it was the output shaft seal, so I pulled the driveshaft and guibo and replaced the seal. The shifter seal looked clean, so I did not mess with it. I put it all together, and no change. The oil is dripping (more like pouring) right onto the cats. Lots of smoke fills the car with just a drop of oil hitting the heatshield. What should I be looking for here. I would appreciate any help.