2002 Chevrolet TrailBlazer Logo
Posted on Mar 25, 2009
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Front brakes shudder a fair bit when braking, even lightly. There hasn't been any whining of brake pads or anything. I am going to change the pads, but how do I know if I need to replace the rotors? Thanks Garrett

  • Anonymous Mar 25, 2009

    Thanks for the help guys. Brake fluid is full/no leaks or visual problems. I am going to replace the pads, but is there a way to tell if I need to replace the rotors or if I will be fine to just turn them?

  • Gseibel Mar 25, 2009

    Thanks for the help guys. Brake fluid is full/no leaks or visual problems. I am going to replace the pads, but is there a way to tell if I need to replace the rotors or if I will be fine to just turn them?

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  • Posted on Mar 25, 2009
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It seems now a days that everyone loves to turn rotors, the only reason to turn a rotor is if it is running out, what this means is that
it is moving back and forth and not in a straight line. What a brake tec is suppose to do is place a dial caliper on the rotor and spin it and see if it is running out,if it is then it must be turned,as long as the rotor is not under the mfg min width. Any vibration,pulsing,shudder,
would tell me that it needs to be turned, just wanted to explain the reason behind it. Any other questions please post back as everyone is more than happy to help.

  • Anonymous Mar 25, 2009

    Sometimes the minimum width can be seen on the rotor,if you have a
    micrometer and can check the width of the rotor, if it is at the min it must be replaced. If you have someone turn the rotor they will check
    to see if it is still in spec.

  • Anonymous Mar 25, 2009

    If you are pulling the calipers apart make sure you apply caliper
    grease to the part of the caliper that slides so they don't stick.
    Most times you don't get new pad clips with the pads when you buy them from a auto store,so make sure the clips are ok.

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Check the brake fluid level make sure its max fill. replace/turn rotors of you see uneven wear from the pads. the machined part of the rotor should be relatively smooth on both sides. if the pads are shuddering i would check out the calipers too. the caliper is what presses the pads into the rotor, they could be sticking.

  • Anonymous Mar 26, 2009

    what odiebugs says should fix your problem and prevent new ones

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You might want to have the rotors turned. It sounds like they may be warpped causing the shudder. Turned rotors new pads you should be good to go or should I say stop.

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