uhh... is my 904 "chirping" under hard upshifts???

Thanks to all for the suggestions.

TrailBeast said

..
Your chirp may simply be clutches or the band taking hold.

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Ok...but this would be a sign of a problem, right? I gather that they're not supposed to make an audible sound...

Lelo Dart said

Have had this as well.
Not liking it.

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Is your transmission built as well?

Bad Sport said

Check your U joints.

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The u-joints have always had a little bit of slop in them (at least since I got this car in the mid 1990s) but that has ever only manifested as a clunk when I put it in reverse and never got worse over the years...It's a very different sound.