Vibration / Squeaking I’m Read End

[Creeker7]

I got a 1997 1500 4X4 Short bed, regular cab 360. The truck only has 147k on it.
It has developed a vibration / squeaking sound from the back end. I took the driveshaft out and had a reputable guy who only deals with driveshafts and u-joint put a new joint in it and balance it.
Reinstalled it and the sound and symptoms are still there. Please give me your thoughts on what my problem might be. Thanks.

 

[Nealuss]

Sounds like it may be in the diff. Possibly pinion bearing. I would have an off road shop or transmission shop check it out. Sometimes it's worth paying someone else diagnostic to get an expert analysis even if you plan on repairing it yourself.