I'm not sure of the original intent of the rag joint completely, but I have heard that it was used as damper. I haven't done the steering box yet, but just doing the shaft helped immensely, mind you though my wander made/makes for quite the adventure, I still have bad tie rod ends to deal with, as well as a loose steering column, and 10" shackles in the front. So with so much bad my gains were highly noticed, as they say in the infomercial "you're results may vary". But both mods are cheap, highly recommended, and thus far fairly simple.
Sent from my SCH-I545 using Tapatalk