When I back out of my garage, the car keeps slamming on the break. It is a small but normal sized garage, so there is room to back out, just not a lot of room. Often the car will stop automatically and very abruptly, 3 or even 4 times while I try to back out. I have to step on the break each time before it will let me try to back up again. Anybody know why it does this, or how to get it to stop applying the breaks when I do not want it to?