Last night, I took apart the rear brake drum to try and fix a squeeling issue. I thought the shoes were low or bad. Ended up, they look fine. I scuffed the shoes and drum up and put it all back together. Did a test run and it was better but still squeeled. I suspect it's the thin metal cover that fits over the drum that is making that noise when the brakes vibrate. I have some anti-squeel that I use for when I change out my cars brake pads. I'm going to give this a try on the inside of the drum cover and see if that was it. I will report back with my findings.