Despite many things tried by the dealership, the problem was never solved under warranty. I gave up as it is frusterating to go back and forth and not be given a rental car living 50 miles away. One thing that I THINK it may be is the driveshaft carrier bearing. It has all the symptoms, and is the only thing that they didn't replace (most likely b/c thats what i thought it was) Without this noise, the car would quite enough to hear a pin drop. Anyone have this problem ending with this solution. I want rid of that damn driveline whine!!!!