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Thread: Rear Brakes Seem Too Powerful

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  1. #1
    Senior TGC Member lonestar22's Avatar
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    Rear Brakes Seem Too Powerful

    every since ive done the rear disc swap, whenever i turn moderately hard and use more than usual brake force, the inside wheel will lock and release repeatedly or just lock altogether. is this common on rear disc swaps? i would assume its due to cars from the factory with rear discs come with 2 piston front calipers and mine have a single piston.
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  2. #2
    Experienced TGC Member njjfudge's Avatar
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    No it is not....................

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  3. #3
    Senior Moderator DOHCstunr's Avatar
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    Re: Rear Brakes Seem Too Powerful

    Quote Originally Posted by lonestar22
    every since ive done the rear disc swap, whenever i turn moderately hard and use more than usual brake force, the inside wheel will lock and release repeatedly or just lock altogether. is this common on rear disc swaps? i would assume its due to cars from the factory with rear discs come with 2 piston front calipers and mine have a single piston.
    Discuss
    flush your brakes out so you are getting even brakeforce distribution.

    you might also want to inspect all 4 sets of pads for abnormal wear.
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  4. #4

    Re: Rear Brakes Seem Too Powerful

    Quote Originally Posted by lonestar22
    cars from the factory with rear discs come with 2 piston front calipers and mine have a single piston.
    no... only 99's had dual piston..

  5. #5
    Experienced TGC Member 6G72gearhead's Avatar
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    Well now you dont need the handbrake to kick the ass end out.
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  6. #6

    Re: Rear Brakes Seem Too Powerful

    Quote Originally Posted by dknight3
    Quote Originally Posted by lonestar22
    cars from the factory with rear discs come with 2 piston front calipers and mine have a single piston.
    no... only 99's had dual piston..
    my 2000 has dual piston calipers.

    but yea, after 2000, the 8g's all had single piston calipers, no matter if it had drum or disc brakes.

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  7. #7
    Senior TGC Member lonestar22's Avatar
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    Quote Originally Posted by 6G72gearhead
    Well now you dont need the handbrake to kick the ass end out.
    yeah true but sometimes i dont want my ass end going out, and its annoying

    it makes me feel like maybe the ebrake is too tight but the tire spins fine when off the ground and id ahve worn away the ebrake by now.

    is flushing a lot different than bleeding?
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  8. #8
    when you flush you replace the old fluid with the new. pretty much just keep bleeding til you have new fluid coming out.

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  9. #9
    Quote Originally Posted by lonestar22

    is flushing a lot different than bleeding?
    Yes, its quite different.

    Bleeding the brakes doesn't replace all the fluids or condition the rubber seals and remove moisture in the system. Flushing is the only sure way to ensure proper brake force distribution and operation.

    I'd recommend flushing your brakes at ever brake job.

    And there is no regular adjustment for rear disc brakes. Though you may have an issue with the E-brake.

    Can you tell which side its locking up on?

  10. #10
    Senior TGC Member lonestar22's Avatar
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    whichever side is the inside wheel when im turning
    RIP GALANT, GOOD MORNING BMW 330i

    330i ZSP (E90) - S4 (B5) / hellaflush

  11. #11
    Quote Originally Posted by lonestar22
    whichever side is the inside wheel when im turning
    Does the ABS (if you have it) go off at all ever?

  12. #12
    Senior Moderator DOHCstunr's Avatar
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    and with brake fluid being as cheap as it is.

    i just buy 3 liters of DOT 5.1 synthetic.

    and i just flush the hell out of them. using more fluid thats even neccesery.
    since i've adopted the "flush brakes at every pad change" method.
    i've not warped rotors on any of my cars, and my family hasn't on their cars.

    its also important to grease the hell out of every contact point and the slide pins with moly-based brake grease.
    that way there is nothing restricting your calipers from their full fluid range of operation.


    so now typically all 4 rotors and all 8 pads....... wear evenly. i don't hav problems with inner/outer pad thickness variances. or drivers side vs passenger side pad wear variances


    once you've ruled out that your brakes aren't working les than flawlessly. you can move to the next set of possiblilties.
    ^sorry for the double negative
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