I am a maintenance aholic first off. I have to fix everything, can't leave anything even minor- for a back ground on this issue. So, I replaced the carrier bearing and rear driveshaft, both clearly bad. I had a vibration and noise from them both. So replaced. I still have this high pitched rotational squeek (It doesn't make it in neutral, so under load only) and a vibration under acceleration between 10-35mph, and it goes away. Then with the window down, driving down the road, at 60 I can hear a high pitched wail , put it in neutral, seems to go away.

I can't see anything obvious. Doesn't appear to be brakes either.