Someone E-mailed me this tonight - hmmmmmmm:

I work for a city we have chargers in the fleet cop cars I have replaced just about every cars lower control arm for just the same rattle you are talking about from what i see on the charger cop cars the front susp. is junk and the dealers say sorry out of warranty Crown vics next year im thinking

Harold's Frame Shop tomorrow AM - I'll post what they find. If it is sway bar link/bushings, I'll probably replace them (myself if I have to) with poly bushings, unless Harold's has the poly bushings. If it needs lower control arms, I'm gonna be pi$$ed!