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Thread: Changed/upgrade shifter bushings, now gear noise. Who's had this issue?

  1. #1
    Join Date
    Jul 2008
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    Asheville, NC
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    My Cars
    98 M3 S54, Audi rallycar

    Changed/upgrade shifter bushings, now gear noise. Who's had this issue?

    Hey guys,

    Glad to see these forums are still active! I picked up my '98 M3 recently and needed to change the shift bushings. I used the kit from Garagistic which uses delrin bushings. I get awful gear noise which is intensifies with load, at around 3k RPM. Present in every gear. I suspect it's noise being transmitted (NVH) from the upgraded bushings. My question is, which bushing do you suspect? I'd like to change back to stock bushings as this noise sucks. Who's had this same issue?

    Garagistic's kit: https://store.garagistic.com/E36-Ova...MaAk7TEALw_wcB

    Thanks!

  2. #2
    Join Date
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    New England
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    F90 M5; E36 M3 Turbo
    That is all you changed? You did not change transmission mounts or over tighten trans mounts?

  3. #3
    Join Date
    Jul 2008
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    Asheville, NC
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    My Cars
    98 M3 S54, Audi rallycar
    Quote Originally Posted by pbonsalb View Post
    That is all you changed? You did not change transmission mounts or over tighten trans mounts?
    Nope, that's all I changed. Left everything intact and just changed the shift bushings. I don't think it's mis-adjustment or misalignment. I guess I'll change back to the stock bushings.

  4. #4
    Join Date
    Feb 2009
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    Mills River, NC
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    95 M3 coupe, 97 M3 sedan
    As pbonsalb suggested, the most common culprit for gearbox noise is super firm transmission mounts. Since you didn't change those I'd suspect the poly bushing in the metal housing that clips to the transmission tunnel. That's most likely to transmit gearbox noise to the body since it's attached to the sheet metal. I bet if you flip that bushing back to OEM rubber the noise will go away.

  5. #5
    Join Date
    Jul 2018
    Location
    Hanover, MD
    Posts
    70
    My Cars
    1997 M3/4/5
    Have a similar problem with the Turner shifter carrier poly rear bushing. Too stiff.

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