Prop shaft is chipped in a few places in new tranny I bought and I have 2 other trannies w/ perfectly good props, so I thought, if it is an easy swap, I would do it. Do I only need to unscrew the coupling nut that goes over the prop shaft to replace it? If so, what is the size of that nut and what could I use to remove it? (looked in archives and found something similar(24mm) but sounded like they were talking about the Drive shaft) Any advice would be greatly appreciated. Thanks. Jimi