The FAQ is all well and good, but if the bushings are the cause of his clunk as mine were (and actually had to be replaced twice before the links gave out) the grease is a very temporary fix at best. The bushings have hardened and slightly shrunk. Visual inspection of the bushings will not show that they are bad. You must grab the bar and try to slide it left and right. If you can do so, they are contributing to your noise (perhaps not the only source though).
Links are much easier to inspect. They should be holding the bar tightly at the connection, and they shouldn't show any signs of ripping/cracking/looseness.
Start by inspecting the links. Next check struts for oil leakage (not likely, but easy check and you want to rule it out), then check how the brake lines are run, are any possibly swinging around? If all that checks out and you can slide the bar around, I would be "98%" sure it's the bushings.
Do some more diagnostic work and let us know what you find.
Brian
99 SVT
