O ring at the end of the dip stick tube? Sounds interesting....how do I check that first. The pan is fine and the rear is also good. The biggest indication of the leak other than the pool of red tranny fluid at each stop is the plume of white smoke that I sometimes get when the car is at rest after a long drive from the fluid dripping onto the center muffler. If I could find a reasonable repair shop in the area I would pay for a rebuild or replacement but no one here wants to warranty their work for over a year.

__________________
1986 420SEL. 200,000 miles plus.
1991 Cutlass Supreme
1980 VW Vanagon (Old Smokey)