I had this same problem. The theory was that the front rotors were warped from over tightening the lug nuts (air tools). The correct torque to hand tighten is 60 ft/lbs. Had the rotors machined or replaced (can't remember which) and the problem went away. Until, the front tires were replaced by an ex-wife and the lugs over tightened again. Burke ------------------------------------------------------------------------ To address comments privately to the moderating team, please address to moderator@xxxx