What causes erratic shifting in a Buick 200C?
What causes erratic shifting in a Buick 200C? Erratic Shifting The 200C Buick transmissions are known for erratic shifting thanks to brittle plastic connectors holding the shift points. Bad modulators may also cause this problem. Also, external sensors on the 4L60E and 4L80E transmissions are also known to go bad and cause erratic shifting. Are there any problems with the Buick transmission? Transmission problems have been identified for every model produced by Buick, though some years have fared better than others. The problems reported vary from transmissions shifting erratically and loss of transmission fluid to transmission failure. There are also...