Had a torque related driveline howl that got worse from new on. New 2005. Hoped it was just the driveshaft carrier bearing. Not so lucky, turns out it needed new ring and pinion gears. Could not help worrying a bit that dealer would get them set up properly, but appears they did a good job. Nice and quiet to drive now. Glad it was done while still under warranty. Cant complain as its the only problem I have had so far.