OK, then. I found a Jeep thread that talked about removing the bushing and even had a vendor and part number listed. Since I already had a tailshaft with the bushing installed I decided to see if I could whack it out as per the thread. It worked so I ordered a new bushing and we'll see what happens in a week when I can get everything together. I have new U joints but I'm sure the driveshaft will have to be looked at.

http://www.jeepforum.com/forum/f37/np231-tail-shaft-leak-fix-82091/

Thanks Gary