Hmmnn... I never thought about the wheel bearings you know.
I hear this whistling sound from the front wheels especially the right one when I accelerate. It stops when I hit the brakes. Could it be the bearings?

I intentionally worked on changing the brakes and the calipers partly because I thought it was the brakes.

I noticed the calipers look 'burnt' sort of. You might notice in the pictures. I'm not sure if the brakes are overheating.

The vehicle is a 4 speed automatic. It originally came with an auxiliary gear which was janked off by the previous owner, perhaps due to gear issues. So it's pretty much either locked to 2WD or 4WD, not sure which.