Drive line noise mystery? Solved

[5022]

My 2013 389 had the driveline between rearends off about a quarter turn from what I considered in time so I went to dealer and questioned it. They said it was an update from factory to fix a problem they were having new from factory. I guess some drivelines were out of balance with the knuckles running in time. I don't have a vibration or hop but it doesn't look right from what I was always around.