Strange thing it been happening for at least a week but it not causing any problems though just some strange noise when I put my car reverse and applying the brakes it makes such as strange noise. Especially this happens when I'm downhill or uphill if the ground is flat it wouldn't make those noises.

This does not happen when I'm driving... it only happens when backing up.

 

Check that the splash shield is not bent into the brake rotor. Otherwise it could be the brake pads vibrating or chattering or squealing. If you think it might be the brake pads making the noise, you could try sanding them to break the glaze.

 

I think I found the problem... I think it because the brakes pads aren't quite loosen up from the emergency brakes. Like I said it doesn't happen during forward only reverse. I'm gonna try check it out tomorrow morning see whats up.

 

i have this problem and i just did front and rear pads and rear rotors as well. only in reverse and only when the brakes are cold, sometimes on a hill as well.