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2G ABS Shifter Base Bushings?

Posted by Kai Hefner, Nov 13, 2019

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  1. Kai Hefner

    Kai Hefner Freelancer

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    While I wait for the bumper risers to print on my larger printers, I've been doing a bit of work making shifter base bushings on the smaller printer.
    I've got a perfect fit now, but I'm wondering, would it be bad to run ABS shifter base bushings for any reason? I've noticed that a lot of shifter base kits are aluminum or some type of metal. Is there any benefit to making them out of ABS besides them being negligibly lighter?
     

    Street Build 393  1

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    Road Race Build 658  2

    1998 Eagle Talon TSi AWD
    awd · manual · 2G DSM
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  2. steve

    steve DSM Wiseman

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    If you can keep the 3D printed bushings from breaking down I can't think other reasons from making them that way. PETG might be another option.

    The factory parts are some type of rubber for NVH reasons and the drawback is movement.
     

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    1991 Mitsubishi Eclipse GSX
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  3. Kai Hefner

    Kai Hefner Freelancer

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    Obviously I haven't tested them but I can't think of any reason that they would break down. Stock is already that garbage rubber thing, I feel like metal is almost overkill?

    How close-fit do the metal ones get? Do they have a tiny bit of play once you pop them in?
     

    Street Build 393  1

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    Road Race Build 658  2

    1998 Eagle Talon TSi AWD
    awd · manual · 2G DSM
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  4. steve

    steve DSM Wiseman

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  5. Kai Hefner

    Kai Hefner Freelancer

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    Calgary, AB, Canada
    Thanks for the thread! Road Race Engineering used to offer a urethane bushing? If I'm not mistaken ABS and urethane are pretty similar in their applications. Although I don't think an ABS bushing could push itself to be in a suspension component.
     

    Street Build 393  1

    1995 Mitsubishi Eclipse GSX
    awd · manual · 2G DSM

    Road Race Build 658  2

    1998 Eagle Talon TSi AWD
    awd · manual · 2G DSM
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  6. rabenne

    rabenne Proven Member

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    Racine, Wisconsin
    Urethane is generally much more flexible than ABS. If we evaluate them both on the Shore Harness A scale, Urethane can range from 30A to 100A (and probably higher) while the ABS will almost always exceed 95A. That said, I think ABS will probably work fine for the shifter bushings. PETG, as mentioned, would also be a decent choice. PETG is very easy to print if the part has no bridging... like these bushings.

    I think they will work either way. I personally have aluminum bushings on the shifter base plate. They do fit with a bit of "slop" - that is to say they are not a press fit or anything. Tightening the bolts down to the chassis still allows them to clamp tight and allow no free play or flex.
     

    Street Build 239  5

    1996 Mitsubishi Eclipse GSX
    awd · automatic · 2G DSM

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    1997 Mitsubishi Eclipse GST
    fwd · automatic · 2G DSM

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    1995 Eagle Talon TSi
    awd · manual · 2G DSM
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