New to the site here and new to the stang. Few days again I got a 2006 V6 4.0 coupe. While driving home from work going down a hill, I pressed the clutch in and put pressure on the brake. The pedal hat like a vibration to it. Not pulsing or jumping. Just a grinding feeling. When coming to a stop I had the window open and I heard a click when I pressed the brake pedal. Any ideas? Don't think it's rotors cuz I got no pulsating feeling. Pads got some life to them. Idk what kind they are along with the rotor. They are slotted and drilled. Any ideas would be appreciated!!!