I have a 2008 QX56 and there is a squeeking sound around the center of the vehicle when it is moving slowly. I have not crawled under yet but what should I look for? The dealer I called describing the noise said it could be the u-joints going bad. I checked for u-joint replacement parts and since 2008, there are no u-joint parts listed so this must be a new design. I plan to jack up the rear and see what is going on.

suspension components --shocks are the first on the list. bushings...

are you the only owner? if not, check to see if the shocks were replaced.

do you notice any bump steer when going over bumps, etc?

I have followup with the squeeking noise. Went to my local Nissan dealer and they said it is the drive shaft. The problem is after 2007 models you cannot just replace the u joints individually but you have to buy the whole assembly. Quote is 1K so i am checking with Belle Tire to seek a more reasonable rate.

I replaced the drive shaft which did stop the squeak. It's too bad you have to replace the whole assembly but it is quiet now.