Have you noticed your brakes making a click noise when going in reverse then again when in drive?

A clearance between the brake caliper brackets and the ends of the brake pads allows for heat expansion and avoids corrosion between the caliper bracket and the brake pads. So, the next time you back up and apply the brakes and then drive forward and apply the brakes, the single "click" noise you hear is just a normal characteristic of the braking system.

Brake Groan

After starting your vehicle, have you ever wondered what that groaning noise is when you first begin to drive in forward or reverse?

On models with a compact anti-lock brake system (ABS) unit, your vehicle's ABS emits a brief grunt or groan when it does a self-check. The self-check occurs when a vehicle is backed up or driven forward after being started. This noise is associated with the ABS self-check and doesn't mean there's a problem with the ABS.