sway bar bushings

Lots of clunking while I'm driving. Grabbed hold of the sway bar links and gave them a good tug. Drivers side, top bushing is the noisy culprit. Should I replace just that one or is it customary to replace 2 or 4 at once?

I don't know how your van is set uo for front suspention (I have a 1994) but I would also change the oppisite bushing just to be safe.

Your problem is very common. At the dealership
that I work, we replace both links, and quite often
replace the bushings as well.

Thanks for the feedback. I take the advice and go with 4 bushings and the links.