I hope that it's not the ball joint on the center link. I was told that the ball joint is not available by itself, you have to replace the centerlink.

BTW, that ball joint is a beeeotch to break loose. I worked at it for hours when I was installing my diff drops. When working on CSTYLES, we messed his up so bad, he had to replace the centerlink.

If you get yours apart, make sure you put 'anti-sieze' on it when you reinstall.