When you drive slow your car makes this high pitched squeaking noise and then when you are at a stop light it makes a grinding sound But when you drive faster the squeaking goes away?

The high pitched squeaking noise you are hearing is the warning device telling you your brake pads are worn out and need replacing. The grinding sound is the sound you hear when you ignore the squeaking noise and allow your brake pads to wear so much that the metal backing of the pad is rubbing a...

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