Hey,
Bill I have looked at the site you reccomended, the had some information but nothign that i could find about the vacuum system. Its great for brake diagnostics

Greg- I think i might have to get a subscription to the one you gave me looks like their might be some possible info.

If the A/C clutch is supposed to rattle only when disengaged, then its definately not my cluch. The whole car smooths out a little when the a/c is off. (OFF on climate control + AIRCOND switch off.) When ever the system gets turned on is when it starts to rattle.