The transmission was replaced at 60,000. After numerous torque converters and being told to deal with it, we left it alone only to replace the transmission.....again. Am having the same problem. No one seems to know what to do. So have left it alone. The Buick dealership seems to go brain dead. Cottman did the first and many torque converters.....do not recommend them. Always had to take it to the dealership and get a computer printout then take it to Cottman to prove there was a problem Still not fixed.