03 4x4 with squeak at launch

[Bellon]

I just started to noticed something different with my truck during launch.



My truck just turned 80,000 miles.



So, I turned off the radio, fan, and rolled down the windows (at 40F), to see if I could hear anything.



At launch, I hear squeaking. As soon as I get moving, it stops.



What could this be?



Any help or ideas would be great.



I've already had both front U's replaced, and the sound seems to be coming from farther back than that. l

 

[bighammer]

I'll throw in my guess for the bearing in the middle of the rear driveshaft. (and move this out of the FAQ forum to the 3rd gen)