Would a failed forward band affect only the 1st gear and none of the others? Also would it only affect 1st gear when the selector is on 2, 3, or D? I'll have to test the car again once it cools down before I can determine if the temperature of the transmission fluid is a factor. The other curious thing was that there were no warnings of any kind. I parked the car after driving around earlier today, and then once I started it again and went to drive the transmission began acting up.