Wow... just count the turns you make to get the nut off, pull the yoke off, slide the new one on, put on blue locktite and then put the nut back the same number of turns PLUS an additional 5 degrees.... (you should get a new nut, which is probably more important than anything else)
and now you're Done
Gonna make him take the entire diff apart and go thru hours of nonsesne and you all left out important details and all because you can't/don't count ?, really, that's the best answer and suggestion ?? get a crush sleeve eliminator to change the end yoke....
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