Torque convertor problems
I need some help.I recently had to have the TC changed ony my 2000 A6 w 2.7T engine. I have the APR 1.0 chip. I used a convertor from IPT transmissions. The convertor seems to work great except below 2000 rpm. It is going in and out of lock and surging. Anyone got ideas for diagnosis or fix.
Thanks



