stiff shifting on A8

[Wally Choate]

I decided to keep my 1997 A8Q and had the transmission rebuilt ($3,876 with a rebuilt torque converter).Every thing is perfect but as I drive, the manual shifting gets progressively stiffer until it will not manually shift gears. If I run errands around town and make more than one stop and exceed 10 miles I have to leave the car in gear when I get home, shut the key off, and let it cool for a couple hours for it to return to normal.The transmission rebuilder says the the oil leaks (I plan to fix) are causing the electrical problems but to me it sure feels like a mechanical problem.Any experiences or ideas would be appreciated.The message about the 1972 100LS was interesting. My only new Audi in  44 years of Audis' was a green 1972 100LS.