Before I start: my car is a 2010 Ford Edge. I've had it for about a year or two now, and the problem started pretty early on in my ownership of the car. I recently did replace the front brake pads, brake hardware, brake rotors and greased the slide pins. I have never replaced a part in the rear of the car, which is where this noise is coming from.
This is a video of the noise. It sounds the exact same: https://www.youtube.com/watch?v=lrxSKocxd6g
When I start backing out, the car is quiet. Not a single unwanted noise. I can even apply the brake, very lightly and nothing happens. I wait a bit, and the noise comes. Like I just encountered a family of whales. It is so loud, it wakes up my neighbors. There is no single condition where it happens, either. Cold weather? It happens. Warm weather? It happens. Warm brakes? Cold brakes? Still happens. I've tried adjusting the parking brake shoe and it may have fixed the problem for a few days.. until the noise returned. I genuinely don't know what to do. The rotors are fine, the bearings are fine, the brake pads still have life left on them.. I have tried a lot of things and I am going to keep trying but I need to know if ANYONE has had this problem before in their car and actually fixed it. Even if it isn't a Ford Edge.
I would also like to know the correct direction for turning the star wheel to adjust the parking brake shoes. I need the shoes to be brought closer together, not further apart. I haven't been able to find a good answer, so if anyone knows I would really appreciate at least just the answer to this question.
One thing I'll note is that on the left side of the car, the rotor seemed untouched on the inside where the parking brake shoe would touch the rotor when engaged. On the right side, it was the opposite. It looked like the shoe had been rubbing from day 1. That's the side I'm focusing on, since the noise also is much louder there usually.