The rear stabilizer (sway) bar bushings. There are 2 of them. If yer gonna do it, do the 2 end links too. B)
What is an "endlink"?
They are a dogbone shaped piece about 4" long with ball joints on either end. One end to the end of the sway bar & the other end to the strut. I did the test mentioned in the FSM for testing torque on the end link joints and all of them were loose & worn out. Tight, smooth & quiet now!