Sometimes while driving after the car has reached the proper temperature for it to be able to engage the TCC it will randomly pop back out and disengage the TCC. I have heard of a switch located behind the break pedal or something like that, but I'm not quite sure if this is the problem or not. I have also heard that the TCC is control by the computer. So my next thought was to reset the computer and see for results. Thanks for your help. Perhaps I'm not explaining it enough here but that is the short of it.