Ive had warped rotors before with the pulsing feeling and a clacking kind of noise when applying the brakes. I have that now on the front of my Sedan, but its different because it only happens after the car has been running awhile and the brakes are hot. After first start up, there is no warped rotor feeling, as it comes to a stop with no noise or pulse in the pedal. Is this really a warped rotor or is there some different problem? Has anyone seen something like this?