Hi I have a 307 sw 54 plate when I'm at about 20 mph the rear squeals without using the brakes when I applie the brakes it stops can anyone help with a diagnosis .
you could try and remove the pads and apply copaslip to all mating surfaces,remove scale/rust from discs,make sure everything is free and give it a go.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix cars.