How much balloon noise is acceptable

[Fiver]

what about other noises? Whirring/whoop whoop whoop ing noises from rear drive unit??

Got a video with sound? (have someone in the back record while you drive)

 

[Lump]

what about other noises? Whirring/whoop whoop whoop ing noises from rear drive unit??

Haven't had that one yet, just the balloon squeal, milling & "clunk clunk" from the DU.

The "whirling/whoop whoop" usually comes from the wife & kids .

 

[alehbaba]

there seems to be a high pitched noise as well as a whoop whoop whoop whirring from the rear DU on the 2017 60d i am speaking of. SErvice center recorded it and the tech said its not normal but after dropping off for 2 days they said it was normal..because they drove another car that it was happening with...yes only 1 other car...and not a 60d. Seems 1 data point isnt really much to decide "its normal" to me.
I will post the recording here when they email it to us as we asked for it today.