Chevrolet Cavalier Forum : “Low Trac Light”

Low Trac Light

On a 2002 Cavalier when the outside temperatures are above 80' the low trac light goes on and when the automatic transmission shifts there is a loud clunk and lurch on the shift. What may be the problem? This problem started end of last summer. During the winter there was no issue. Now that it is warming up again the problem's returned.