I too have this issue. Only occurs when turning to the right. Has only occurred two or three times for a brief period of time in almost 6000 miles. First time was more like rubbing last time was yesterday and it was more like gears trying to mesh. I've not taken it to the dealer as I'm almost certain they couldn't duplicate the problem. It seeminlgy has only occurred at very slow speeds. My car has the tiptronic trans. Curious to find out if anyone can identify the problem.