Under load and not a high frequency moan/howl suggests CV axle. Does it change which steering input? Find a hill you can reproduce the sound/vibration and see if you can get it to change by steering pay the centerline.

Did you ever hear small tick tick sounds driving slow? (that's a guibo)

The CV I think it's six bearings so 3/revolution is off by two. If you get a spike at 6x revolution I would expect CV to be the source.

Have you ever had to change boot? Are CV Original (or recently changed)

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)