are the anti rattle clips in?
are the caliper brackets definetely in the right position and bolt tight?
are ur slides greased?

just a few things u can look at. im sure others will chime in.

Steve


2002 Cougar 2.5 duratec/ mtx-75 85,0000 Mondeo ST-200 wheels/BFG KDW NT black/black Spec Stage 1 Torsen T-2 Trubendz 2.5 flowmaster dual exaust apexi s-afc II K&N FIPK