I assume you mean knuckle? The spindles go on after the shafts are already in. You have to file/grind the knuckles a little bit. It doesn't take much.blakeape said:Anyone had a problem fitting yukon shafts through the stock dana 44 spindle. I don't want to pound these in because I've already had to grind the ears off the busted stocker to fit those out. By the way I've got longfield u-joints.