04+ sway bar links can get sloppy and make that clunking noise. They have ball type joints with a dust boot on them, if the boot gets buckled or anything and road grit gets in them then they get wallered out and rattle. Jack it up, both wheels in the air and wiggle the sway bar links, if they move at all then that is your problem. I had this problem because the factory boot was pinched in one spot letting water and crap get in it. When I took it apart it looked like it was full of sand.