Curz

My left rear tire makes a metallic squeak as I drive now. It just started yesterday and its bad.
Could it be the brakes? Its sounds like im driving Maynard from the Cars movie. Im afraid to drive
it. I dont think its suspension because its no louder on flat roads vs bumps. The scratchy sound picks up
as speed increases? Any ideas?

Jazzer The Cat

If the noise increases as you speed up, it is a rotating mass issue. This would mean brake disc most likely. Take a close look at disc and around back side of wheel and look for contact locations that have scratches. Does the sound stop or change when you apply brakes? Try to stop using "E" brake as well and see if that changes as most foot pedal braking is front wheels.

Jazzer

severnrc

You could very well have a rock between your rotor and brake pad...like the man said, check your rotor for damage.

Derf00

Could also be rocks stuck in the tread of the tire.

S281 E

Sure its coming from the back and not the front?

Pony on

It's a bent tab on your rear brake. I had the same on my car the day I picked it up.
Simple fix, remove the wheel and see where it's rubbbing and adjust back. Or any Forddealer will fix it since it's a stock mustang item under warranty.

Curz

rotor appears to be fine and its def the rear left wheel. I will check the
brake tab. Thx guys