Picked this up about a week ago.
Here's what I can tell you: whenever weight is applied to the rear suspension I get a horrid grinding moaning squeaking noise. Getting in the car, hitting bumps, anything that compresses the rear more than about .25".

Car does have surface corrosion in rear suspension from winter driving but no body rust or frame rust. I used some spray lube on what I could see under the car that looked like a moving joint and no change.

Car does have nivomats.

AWD has been disconnected.

153k mikes.

It's a project/spare car so I don't really want to go to a shop, or invest 1000$ in suspension components.
I'm a DIY on the cheap type with this car.

Ive been led to believe from searching this could be a sign the spring seats are bad and the springs are rubbing?

The noise comes from both sides.