If you can see play, replace immediately. You can buy the 4 ball joints separately. 3 are RH thread and 1 is LH thread. It isn't too much more to order them with the drag link (front) and track rod (rear) already in place. It makes it easier. I did this on the front because my drag link was bent from offroading. Replace your steering stabilizer while you are down there. The OME one's are great. Then get it aligned