clunking from rear after installing coilovers + multilink?

hello everybody,
i was just wondering how many people here have clunking suspension.  i put in coilovers and pillowball arms -- everything is tight back there, so what else could be happening?

thanks :)
charles

What suspension? What chassis?

Do you have pillow ball top mounts for the coilovers? I'm gonna guess it's that.