I replaced my front brake pads this past weekend, due to a squealing noise. When I remove my brake pads I noticed 1 of the 4 pads were worned almost twice are much as the others. This brake pad was just about entirely down to the metal, now the other 3 pads did not look that bad having at least half the pad still left on them.

What caused this?

My calipers and pistons are quite a bit rusty, but the piston goes back in just fine and I was able to reinstall new brake pads with no problem. Now this morning I noticed the squeal again, not as bad but it is there.

Could a brake pad be sticking to the caliper somehow?

The brake pads I removed were OEM toyota brakes pads and what I installed are OEM pads too.

Thanks for any help.

 

It sounds like you have a stuck caliper. I would rebuild the calipers. The rotors have probably been exposed to a lot of heat from the stuck caliper as well. I would make sure they are not warped, cracked or heavily worn.

 

this may help to figure out if you have a stuck caliper.

find a nice stretch of road where you can safely acclerate and slam on the brakes...if your truck dives to one side..you have a stuck caliper

 

I have found that uneven pad wear can be a result of rusted dirty slide mechanisms on the calipers not allowing the pads to move freeely. When you replace brake pads, make sure that you carefully wirebrush clean all of the rods, brackets, passageways, etc. that the pads slide on, and then wipe off and replace any dirty brake grease with new synthetic high temp brake grease.

 

Like everyone else said, spend the $30 and rebuild them. You're problem will vanish. Unless your pistons are totally screwed, don't waste money on remans...

Have you ever seen a Tacoma/4Runner caliper? They're fixed, not sliding.