Question about 1998 Jeep Grand Cherokee

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Rear brake rotor noise

Should i be hearing the rear rotors spin the pads are at 50% and the noise is at 55 mph it starts about 25 mph ?

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Warp rotors tend to make noise at low or high speeds depending on the degree or how badly warped they are, if the brake pedal kick back when you apply the brake then you will have to get new rotors installed

Posted on Apr 25, 2010

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Bear tracker squealing noise when trying to start after running it goes away help please it sat for a year before got rear end fixed


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If so, a bearing -or track - usually makes a grinding or knocking noise, not a squealing noise.

If a car stands for a long time the brake rotors can corrode a bit and the pads can stick. Sometimes, when the car is first used after standing, you may hear a rubbing or squealing noise from the wheel. That's the pads sticking to a rusty rotor. The noise may wear off after a few miles when the pads 'polish' the corrosion off the rotor.

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check rear rotors and front rotors for rust buildup (flahlight helps). does the vehicle shake when you come to a hard stop? You will either need to have a front or rear or both brake job (rotors cut or replaced and new brake pads) If the vehicle is shaking when coming to a stop, its probably your front pads. If your hearing the noise from the rear its the rear pads or it you hear it from the front its the front pads. If there significant rust build up or your pads are low a brake job is recommended.

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I was going to replace the rear rotors and pads on my 2001 Jetta on the weekend when they began to grind when I stopped. However friday morning the brakes were soft and slow to brake. When stoping from...


The grinding sound was the metal part of the worn out pads chewing your rotors up. If the sound has stopped, then something is completely gone, probably what was left of the pads. You will most likely need new rotors, Advise you don't drive the car until the brakes are repaired.

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Ranjit,

I have the same problem with my 2008 Hummer H3. I had the front and rear rotors resurfaced. I am now thinking of getting the rotors replaced with bigger more durable rotors. Solution about the sticking brake caliper sounds about right if you hear a grinding noise as you drive without even touching the brake pedal.

Amardeep

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probably a dumb question, but if there is a backing plate, did you make sure it isnt bent and hitting the rotor? you never want to sand new rotors, although i dont think it would cause this concern. i would suggest lightly scuffing up the brake pads. this will eliminate any noise caused by the contact of the rotors and pads. if it goes away then you know its a problem with the pads/rotors.

scoring of only the inside rotors would make me think that possibly the caliper slides are frozen up. make sure they move quite freely on the slides. it is not uncommon for brake pads to score rotors though.

but brake noises at low speeds that dont' change when applying light brake pressure are usually some sort of metal or something contacting the rotor.

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Did you check the emergency brakes? The rear rotors have drum brakes on the inside. You may have to loosen the adjustment to get the rotor off.

They will try your patience. Even brake shops miss the diagnosis. Hard to very hard to replace the mounting springs.

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The most likely cause for your brakes grinding, especially on one side, would be a warped rotor. As the wheel spins this warped rotor is making contact with the pads. As you apply pressure the pads make full contact with the rotor causing the noise to stop. The pads may also be bad. Too much heat will cause the rotor to warp. Your best bet would be to replace both the pads and the rotor as either of them can be causing the problem. I do NOT recommend changing just one side of your brakes as this causes uneven braking and is ultimately dangerous.

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Did you check the rotors to see if they were cracked or 'thin' ? Rotors sometimes get really thin with use.And they can crack. Or as in one case that I know of there was sand between the rotor and the pads. The pads were also new. Removed the gravelly sand and they worked fine.

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