1988 vette- a/c checked out and working perfectly, however whenever car is side loaded to right (normal intown turn) a/c or vent goes to full hot through vents. to correct all one must do is shut the a/c or vent off, then side load car to left (left turn or just jerk the wheel to left) a/c works perfectly after that. I know this is a vent door problem, but before taking things apart i would like to know just where to begin. any ideas. thanks for any help.