Need help ID-ing issue with bearings

[justKen]

Universal Joints - Front & Rear
Pinion Bearings - Front & Rear

Beyond these, and you're sure the front bearings are good (rears?), carrier bearings can squeal and make an awful banshee-like racket if they're run hot/ no gear oil.

/K

 

[Marksfps]

Update :
I'm an audio engineer by trade so I got 4 mics put 2 above the front wheel wells, 2 in the rear... I now know it's definitely the right rear!

And closer observation of the noise sounds just like knobs on a tire around 40-50 then louder growl at 70.
My tires are not knobby. Thinking now it's the right rear bearing.

 

[ChrisOIFdoc]

Bearing, axle, diff, you won't know till you start the process all over. Good luck and let us know.