One more note to this thread. I also found the rubber Flex plate (Giube) on the transfer case axle was actually the worse one and most of the cause. The center bushing was worn and found one bolt missing.

If you change them change the trans-axle one as well.

__________________
2002 X5 4.4i Sport Wheels
2014 X5 35i M Appearance & suspension package
1995 Porsche 993
1972 Porsche 914-6
2020 GLE 450 Twin Turbo
2019 Alfa Stelvio 500hp Quadrifogilo
Many motorcycles