Quote:
Originally Posted by norcalpb
I put a plastic washer on the shifter which I believe got rid of my rattle but it would be nice to have someone else try this and report back:

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I tried something similar, I bought some PTFE sheet and cut out washers to get the correct thickness. It did not work for my IRP shifter.
I'm wondering if the shifter itself isn't the issue, but rather acts as a tuning fork for whatever resonance is already present.