I have a friend who owns a shop and just picked up an '11 GT shop car. It hasn't seemed to do to well at the strip and they are running it with the T/C off, but they were saying that there was some other function that needed to turned off as well. They claimed that the same button to turn off the T/C needs to be held down to turn this off as well. Is this correct? I ask because they want me to make some runs in the car and I want to make sure that it is running to it's full potential.