OK, so I'm deep into the rear end rebuild right now, and I'm trying to take the half-shafts apart to give them their "30,000 mile repack" that no one ever actually does. I already have all the U-joints out and I'm replacing those, and I've bought new half-shaft boots (They're actually still available from Nissan, and not very expensive). To use the boots, I have to take the shafts apart anyway, so a good cleanout and regrease would be good too. But. I can't get them apart. I have the boot s