Hey..same problem that I had. Take a look on the link to Fordspart direct...It has a schematic of the rear suspension and shows that the bushing are available. I had the rear clunk and replaced the usual bushing/links/struts to no avail...Then saw that the tie bar bushing that attaches to the chassis(mine was worn on this side) was worn out...Replaced that piece and all is quiet.....99 SVT with 46K.........I suspect most rear clunks are the tie bar bushings and not anything to do with the sway bushings etc.
