do you have a 250 or 350. it sound like you have a 250 with the dana 50 ttb. my dana 60, both axles just pulled out. the dana 50 has another joint in the midlle, where the diff flexes. dont ask me how to because i have no experience with it. i have just read about it and thought, what a pain in the ass.
EDIT: i just did some checking for you. on the dana 50, there are actually three axles. one on the driver side, and two on the passenger side. where the axle pivots, there should be an open space. you should be able to see a rubber boot covering a slip joint, where the two axles meet. undo the clamp(s) and the outer shaft should pull out. the inner axle, or stub as it is called, is locked into the diff case with a c-clip. clear as mud?
Another EDIT: you should put your truck info in your sig so we know what you have and what you done to it.