I didn't replace any parts, I ended up ordering a new one (almost $1,000). The drive shaft was so badly pitted at the upper seal and the upper bearing that the Machine Shop advised turning it down to smooth it out wouldn't be a good idea. Also, the housing surface the upper bearing race seated against was badly pitted.
You'll get the black piece out, just a matter of time. Easy for me to say! <;-)
You might try to apply some heat to the aluminum (wasn't the black piece plastic?).