So the fix is for hardened carrier plates. This doesn't fix "end play" but will minimize backlash. End play is back and forth looseness axially while back lash is looseness that you would see in the direction of rotation. Information can be found in Team Update #10.
http://www2.usfirst.org/2007comp/Upd...pdate%2010.pdf
Take care of this before Feb. 16!