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I replaced all four corners with OEM pads and rotors, greased the shims (each side of each shim) and flushed Toyota Dot 3 fluid. The hum is not a faint hum - it's VERY VERY loud. The corner with the hum did give me trouble - using the cube, the piston seemed to stop short of turning all the way down...at least it looked like it didn't crank down as far as the left rear. Nonetheless, I proceeded and was able to get the pads over the rotor....though just barely. The hum showed up and I took a look...one of the caliper mounting bolts had backed out a bit. I tightened it down and hoped that solved it....nope. Today I loosened up both caliper mount bolts and used the lug nuts to hold the rotor flush to the hub then re-tightened the caliper mount bolts.....a little better, but the hum is still not solved. Maybe the caliper wasn't mounted properly and the pads aren't/weren't parallel to the rotor?
I'm not sure what's left to do. I can try to bed the pads in again...maybe flush some more fluid through the line? Any ideas?
I'm not sure what's left to do. I can try to bed the pads in again...maybe flush some more fluid through the line? Any ideas?