MikeKMitchell
06-01-2010, 12:50 PM
I upgraded 4runner brakes to tundra (replaced rotors, caliper and pads). Brakes work great and have not developed the slight vibration on long downhill when old smaller rotors heated up. One problem I noticed is a loud rattle when going over a bump unless brake pads are slightly engaged to the rotor. Anti rattle springs installed correctly on calipers/pads ("W" shape when looking at caliper/pad from the front). I bought additional springs and installed on top AND bottom of pads ("M" shape on top and "W" shape on bottom). More force now on pads to keep them engaged with pisons. Also put "anit-squeal" blue goop on back of pads (slightly "cushions" interface between pistons and pads I guess). Clunk is gone. Not sure if additional spring or blue goop solved the problem but problem solved.