Hi,
I did not find the initial squeaking source, and it's coming louder UNDER LOAD, meaning uphill or downhill, while on straights it is quiet. I also notice slight vibration at higher speeds.
So here's updated VIDEO of how it sounds like:
https://youtu.be/MzofzQvsmRk
2 of 4 U-joints were replaced. Might U-joint make this sound?
Also I know ball joints on front and rear legs are worn out, but that's not the right sound, I guess.
It sounds like some rubber hitting the rubber on each driveshaft revolution.
Any idea?