I had the same problem.
I removed the entire shaft.
Cut the bellows off.
There is a snap ring inside that holds the bearing and two plastic shims/retainers. If you get the snap ring off (about 1 1/2 to 2") the shaft should pull out IIRC. My bearing was also bad from the water leaking in the bellows. I could not find an exploded view. It was still hard to get the shaft off the u-joint.
Phil