E32 750 transmission rough shifts

[Erlingur]

Hello BMW fans.
My name is Erlingur and I just bought my 3rd 7-er.

It is an 91 750 with 216.xxx km

I'm very happy with the car and the contition is extreamly good.
There are though two items that I need to fix.

I think that the ZF shifts way to roughly! It is like that the computer does not cut of the motor when the transmission is shifting gears. I would like to get this fixed for firmer driveing and to protect the ZF unit.

There is also an light vibration arround 40 km/h
The central supprot for the drive shaft is new and the tiers are OK any tips.

I'm sorry for not writing in German my skills are not that good yet.