metallic noise 90Q20V

[Solomon Ngan <sngan@netaccess.on.ca>]

Hi everyone,
My '90 90Q20V has a light metallic noise during "on" and "off" clutch 
while changing gears (during driving).  It sounds like certain high pitch 
metallic or ceramic objects vibrating.  Does anyone have similar 
experience ?  The noise level is rather low, ie : doesn't sound too 
alarming at this time.  I don't want to make a big thing out of nothing.

I suspect one of the following :
1. It is normal,
2. Normal (or otherwise) sound from the catalytic converter - it was 
   recently rebuilt,
3. Clutch release gearing.
4. Who knows !


I would appreciate any help.  Thank you in advance.

Solomon Ngan     '90 90Q20V / '84 5000S