First of all, thanks for your input. Unfortunately, there was no progress with the transmission yet due to some urgent problems with my daily car (1989 Mercedes 190D). The rear axle frame was rusted through + some 'minor' ventilation holes around the spare wheel well and rear wheel arches: 





Full rear axle restoration later + patching up ~5 holes I am now ready to get back to the transmission noise. 

@EuroDat Just saw that you are living around the corner. People are saying you are an expert in those transmissions.  Maybe I can bribe you into a transmission-rebuild-weekend with some jerry cans of 'tax free' Aral Super Plus (Or other German 'Köstlichkeiten' of course)? 

Hi Johnny,

I sent you a PM😁

Listening to your video again. I'm fairly certain it's a centre bearing.

Edited June 8, 20222 yr by EuroDat