Hi all. I am having a problem with my new RX400H. Once in a while it has a "kick" or jerk while backing up our of the garage or sometimes going forward at slow speeds. The test drive had no such kick. It started after about 125 miles. It almost is like the changing of gears used to be in older cars. I brought it back to the dealership & could not make it jump as much. There was only a slight jarring, which seems to be common in the cars. I left it overnight & was informed that there was nothing wrong with the car. Could it be that I am spoiled with the other Lexus that I have owned? he other cars I own give a really smooth ride.