Miata Mailing List: June 1993, Message #71
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   From: Milton A Horst <@ada3.ca.boeing.com:horma200@ccmail.boeing.com>
Subject: High Pitched Hissing
   Date: Mon, 21 Jun 1993 14:42:35 -0400


Hmmm

"hissing noise from under the car that goes away with light
pressure on the clutch"

This sounds like another manifestation of the infamous "clutch
chirp" that has plaqued many Miata owners.  It is caused by the
clutch fork vibrating against the plunger of the slave cylinder.
The cure involves putting a dab of grease on the fork where the
slave cylinder plunger contacts it.  You can either crawl under
the car and do this with your finger, or put some grease on the
end of a long stick and do it from above.  Don't laugh. I didn't
believe this would fix it myself until I tried it.

Milton Horst
Seattle, WA