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  1. #1
    GT Level Member DnaProdigy's Avatar
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    Default Rear brake pad wearing down on an angle - 2006 Grand Prix GXP

    Title says most of it, any ideas? Here is more info.

    1) Brake pads replaced 2x. Rotors replaced once.
    2) After about a month the rear, passenger side brakes start squeaking.
    3) upon inspection, one of the pads is wearing down sideways (along the length of the pad).
    4) It is the pad touching the piston.
    2006 Grand Prix GXP

  2. #2
    Killa Bee Scottydoggs's Avatar
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    Default Re: Rear brake pad wearing down on an angle - 2006 Grand Prix GXP

    bent caliper would be my guess. both pads wearing angled? or what one? is angled?

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW

  3. #3
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    Default Re: Rear brake pad wearing down on an angle - 2006 Grand Prix GXP

    I'd be looking into the bracket and slides.

    SMGPFC Member #1

  4. #4
    GrandPrix Junkie spazzz's Avatar
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    Default Re: Rear brake pad wearing down on an angle - 2006 Grand Prix GXP

    Probably wrong kind of grease on the caliper pins.
    The one with the rubber sleeve is no doubt swelled and stuck.
    I just tossed one last week when doing my strut mounts in the rear

    Silicone with ptfe doesn't break down rubber

  5. #5
    GT Level Member DnaProdigy's Avatar
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    Default Re: Rear brake pad wearing down on an angle - 2006 Grand Prix GXP

    Quote Originally Posted by Scottydoggs View Post
    bent caliper would be my guess. both pads wearing angled? or what one? is angled?
    Only 1 pad is wearing our on an angle, and that is the inside one. The one touching the piston.

    Quote Originally Posted by Fivefingerdeathpunch View Post
    I'd be looking into the bracket and slides.
    For something bent?

    Quote Originally Posted by spazzz View Post
    Probably wrong kind of grease on the caliper pins.
    The one with the rubber sleeve is no doubt swelled and stuck.
    I just tossed one last week when doing my strut mounts in the rear

    Silicone with ptfe doesn't break down rubber
    If one of the caliper pins was stuck, wouldn't either the left/right side be wearing down fast rather than top/bottom? And if that is it, you are saying a new boot would solve it?

    In general what should my next steps be? Replace the boots, grease up the pins and try again?

    Links to the pictures:
    http://imgur.com/CtG5XoQ
    http://imgur.com/0eV3Iq0
    http://imgur.com/R6Cyxs4
    Last edited by DnaProdigy; 02-06-2017 at 02:38 PM. Reason: Added Picture Links.
    2006 Grand Prix GXP

  6. #6
    Killa Bee Scottydoggs's Avatar
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    Default Re: Rear brake pad wearing down on an angle - 2006 Grand Prix GXP

    take the caliper off, then the two bolts with the boot that holds the caliper on, clean them both and the holes they live in with brake cleaner then grease them both and work them in and out of the caliper till they slide like butter, add more grease if need be. then bolt it back together.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, 2.8, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW

  7. #7
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    Default Re: Rear brake pad wearing down on an angle - 2006 Grand Prix GXP

    Looking at those pictures it looks as though the piston is cocked in the bore.

  8. #8
    I can't car too good. SaukRapids's Avatar
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    Default Re: Rear brake pad wearing down on an angle - 2006 Grand Prix GXP

    Does the parking brake seize on that year? That'll cook a caliper too. I'd have to agree that something about the seal around the piston makes it look suspect.

  9. #9
    GrandPrix Junkie spazzz's Avatar
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    Default Re: Rear brake pad wearing down on an angle - 2006 Grand Prix GXP

    Well I was on another planer back there.
    That piston does look jacked, Sauk might be onto something

    Oreillys has a rebuild kit for 6.99.
    My bro bought some powerstop rears and one side leaked. I had to get an Oreillys rebuild kit for it. Was really simple.

  10. #10
    GrandPrix Junkie spazzz's Avatar
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    Default Re: Rear brake pad wearing down on an angle - 2006 Grand Prix GXP


  11. #11
    GrandPrix Junkie Bronco Boy's Avatar
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    Default Re: Rear brake pad wearing down on an angle - 2006 Grand Prix GXP

    I had the same thing last year. One of the caliper slides was sticking.
    Chris B
    2002 GT

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