It's a ZF change that messed up the axle, ZF convinced Chrysler and Fiat they they had a cheaper and better way of making the part, it wasn't a good decision, I hear they added more oil and it seems to helped the problem, dramatically (95%), fiat and chrysler engineers and upper management were in yesterday at marysville and will decide by next week what to do with the issue from the bearings from China that are "softer" than what they used before, you were right, it wasn't at Detroit Axle, i was given some wrong information, i called and got the correct info, thanks TEAM Member, let's hope they get it right, but ZF dropped the ball on this one, big time, i hear there were really 3 issues? is that correct?