When the sound occurs again, see if it changes when applying the brakes lightly. If it does, you may be hearing a brake pad wear indicator. Brake pads twist very slightly, then straighten out when they are applied. For that reason, depending on where a wear indicator is placed on the pad, the noise can get worse when the brakes are applied, or it can go away completely.
Sunday, October 16th, 2016 AT 9:47 PM