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Q: What could be causing the squealing sound when i brake after i have replacedthem on 1994 Lexus LS400

I replaced the front brake pads. The squealing started from the driver side. Instantly after replacing them it still made the same sound when i brake about half way down but all the way down it no longer makes the sound. After about two weeks it started on the passenger front too. I have had three people look at it and no one can find a solution. I'm thinking the calipers but i would like to be sure before purchasing.
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Top quality OEM specific (type) brake pads, mounting hardware and rotors de-glazed (lightly machined) upon installation????
agree with pushrod, cheap parts are usually costly, make sure your calipers are not hanging up - pistons/slides properly cleaned & lubed, along with quality parts. make sure the frt. hub/wheel bearing has no excessive play properly torque wheels (lug nuts) in a star pattern.
Several things could cause the squealing. Did you use Brake Pad Lube when you replaced the Pads? Did you buy and install the "Hardware Kit" for the Calipers? Very important--Did you replace or have the Rotors turned? If not, I would be pretty sure that is where your squealing is coming from.
I did get the brake pad lube. I didn't get the Hardware kit for the calipers or have the rotors turned or replaced. Probably my next step. Thank you.
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