My 2000 4Runner has got a clicking sound coming from the front brakes. It started a few weeks ago. They seem to function perfectly fine and it hasn't gotten any worse. I think there is a TSB covering this problem but I was wondering if anyone here has had a similar problem with their 3rd gen 4Runner and if any of you know specifically what the cause is? Any help is greatly appreciated.

2000 4Runner, OME 882 front coils w/ firm shocks, 891 rear coils w/ firm shocks, Sonoran Steel adjustable rear panhard bar, ARB Prado bullbar, Warn 9,000lb. winch, Amsteel synthetic winch line, Hella Lights, 265/75R16 BFG All Terrains