There is a grinding sound coming from the right front wheel on my wife's 02 sequoia. I have already replaced the pads and had both rotors turned, which didn't fix the problem. The grinding sound only occurs under braking. Both hubs spun freely and there was no slack or wobble to them but you could hear slight grinding sound on both. This was after I removed the caliper and rotors from both hubs. It does have 150,000 miles on them.