This doesnt happen alot but it sounds like if you went into a small pot hole. The few times it happened i was at a stop light, parked and driving out my driveway most of the time it happens when i am parked. As i said it only happend a couple of times. On another post i saw an actuator cam problem can anyone cast some light on what may be happening hare. Thanks

Thankfully i am under warranty 2700 miles, 2004TB LS.