Usually when the wear indicator starts contacting the rotor, it will do exactly what you described. Better sooner than later, take a look at your pads before throwing parts at it, if possible mic your rotors at the same time. Also check your bearings. On a few rare occasions I've had the symptom your describing at work, and found a bearing being the root cause. Are you doing your own work?
Last edited by blu30val; 02-17-2013 at 08:49 AM.