I have a 94 GMC Jimmy that the rear pass. side inner pad wore to metal and ruined rotor. So I replaced rotor and installed new pads on both rear sides. Now with new pads installed the rear brakes will not completely disengage. With the vehicle up on jack stands and transmission in Neutral you can barely turn the wheels with no brake applied. Help??
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Re: rear brakes not completely disengaging
Your inside pad wore out first do to a bad caliper or frozen slide or brake hose.remove brake hose off the caliper and see if you can turn the wheel.if you can replace hose and bleed caliper.if wheel still doesn't move buy a loaded caliper,this will come also with new slides!and then bleed
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you need to get new pads (and probably a rotor) installed-your pads are now down to the metal, so you have metal to metal contact at the rotors. Look through the openings at the wheels, at the rotor surface-if it is an outer pad, you will see the gouge marks in the rotor face.. If the inner pads are down to metal, you have to get under the car and look at the inner surface of the rotors to see which one is all the way down to metal. Ideally you should replace both sides with new rotors, but at least replace one, with new pads (both sides, of course).
More than likely you have not fully compressed the caliper piston into the caliper. Take the old inner brake pad and clip it on back onto the piston. With a large clamp (one side on the back of the caliper behind the piston and the other on the face of the old brake pad) and compress the piton slowly by tightening the clamp. It needs to bottom out completely. Remove the clamp and old brake pad and install the new pads. Make sure that when you install the caliper to the rotor that the brake pads stay locked in position and it will slide over the rotors and fit snug.
Rear brake shoes as fitted to drum brakes can typically last up to 60k miles with periodic adjustments, but you have rear disc brakes and the shoes will typically last half of that.
Also, modern brake pads no longer contain asbestos and are now made using harder metallic compounds; the direct result is that brake discs (US=rotors) are also considered to be consumable items as they are worn down by the harder pads. It's not unusual to have to replace front discs every other pad change and rear ones with every pad change; in both cases the mileage will typically be around 30k miles on most models.
You need to have your brake pads replaced. They make that sound when they get worn down so you know to change them. There is a little piece of metal that rubs on the brake rotor to tell you this. Hope this helps