I have a 1995 Park Avenue 3800 Tranmission shifts perfect until you drive about 30 min. After that time peroid if it ever down shifts out of overdrive, it will not go back in. The only way I can get it to start shifting into overdrive again is to Continue driving, shift into neutral, cut engine off, restart engine and put back into drive. Works perfect.
Friday, February 18th, 2011 AT 1:49 AM