Videos are here! It is now reproducible on medium throttle and acceleration from a dead stop.
I've been under the car multiple times. Nothing is loose, transfer case has new fluid and calibration and a new front driveshaft. I'm thinking the center bearing on the driveshaft going to the rear as the culprit now...
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2017 X5M, Donnington Grey, Aragon Brown
Eisenmann Pro, Dinan Intake, BM3 Stage 1, XHP Stage 3
21" Vossen VFS-1 on Michelin PSS