I believe that is a common problem with GT350s. The dealer will probably replace it for you.I realize this may be better suited for the technical forums, but since it happened on the track, I thought I would put it here. I had a check engine light on this morning and the code showed as a P0128, which looks like my thermostat is stuck open. I'm going to replace with a 170 thermostat, so it looks like it was hotter than I thought. I was curious if this had happened to anyone else.