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2G ABS Shifter Base Bushings?

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Kai Hefner

Freelancer
480
272
Jun 21, 2018
Calgary, AB_Canada
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?
 
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.
 
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?
 
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.
 
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.
 
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FWIW... Chevy rocker arm pivot balls make great mounting "bushings" and you can get them free if you know where to look. You reuse the insert, and then just a couple washers. I've been using mine for 15 years now. Just recently revamped the whole unit wih home built oilite bushings and rust encapsulating paint.
 
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