So I recently changed out my rear sway bar, and a couple days after doing that I started noticing the occasional clunk from the rear. I figured the new bar had already blown the weak rear end-links so I ordered up a new set and put them in... but the clunk didn't go away.

I've noticed that the only time I really hear it is when the car is rolling at slow speed. I really haven't noticed any "clunk" sound when going over bumps, but it's definitely noticeable at a roll. The sound seems to be directly related to the turning of the wheels because its frequency is affected by the speed of the car. From a slow roll it "clunks" as the wheel turns and as the speed of the vehicle increases, the "clunks" pick up speed as well... until I reach about 25 mph. After that point it seems to completely disappear.

I was just under the car the other day to put in new end-links and some stoppers to keep the bar centered, and I didn't notice anything out of the ordinary. Can anybody lend some in-sight? I'm stumped.

how did you install the endlinks? If the joint is allowed to spin in its housing, it can damage the joint, which would pretty well negate the new links.