I was just wondering if anybody else has this problem/annoyance? When I'm stopped, let off the brakes and press on the gas, I can hear a slight thump that's coming from the rear of the car(transmission)? Sounds like transmission engaging. Is this normal for the car or should I take it in to be looked at. This was a CPO car and I've had it for about 2 months now. I've only noticed it recently since I normally have music on but the kids have the been in the car recently and they take naps after a long day at Disneyland so everything is off. Thanks for your input.