I have a 2011 F350 with the 12 bolt sterling/visteon rearend, equipped with electronic locker. I know its been tossed around...... I locked it in, used it, pushed it in to unlock..... And well its staying locked in. Dropped it off at a repair shop. He's gonna tear into it on Thursday. In short form what are ya guys seeing go wrong AND what are ya guys doin in this predicament?????