For all things auto ac repair
The grinding or growling of metal on metal means, of course, that the pads are completely worn away. Brake repair specialists recommend that car owners have their brakes serviced as soon as it becomes apparent that something is amiss. You should still have your brakes inspected at least once a year even if nothing appears to be wrong. Certain maintenance tasks should be performed regularly as well in order to keep your brakes in optimal condition and brake repair to a minimum. Be sure to have your brake fluid tested for the presence of metal particles and moisture.