Hey all, I have a 2007 f350 srw 4x4 3.73. Have a severe clunk and disruption in the drive train. I pulled the diff cover off and noticed that all 6 bolts on the locker are broke, 4 have worked them selves out and been chewed up. 240k on truck, diff fluids only had 80k on it. What causes this. Can I put a rear diff from a 2011 sd 3.73 in its place.