Driveshaft

I had a similar knocking sound at takeoff and it turned out to be the center support bearing. The "black rubber bushing" is called a flex disc and I do not believe it would cause a "clanking sound", if there are cracks in the flex discs you need to replace them.
I know you said your center support bearing was fairly new but from your description of the sound I would suggest starting there.
Armani



