You have to tap the front of the prop shaft off like Justin says. I used a hammer around the lip with a piece of plastic I had lying around to distribute the blows so the lip didn't get deformed. Mine was like factory new inside and had some opaque grease in there. Good luck. Keep turning and striking and it'll work itself free. One thing to keep in mind is that the area you are hitting is bonded to the shaft through an elastomeric(rubber)bearing. The force of the rubber will try to keep pressing the front part of the shaft forward, so after awhile, you will have to hold the metal lip back from the differential ring by hand and work it free. You'll see what I mean when you get to that point.