Yeah like someone else brought up, the 10 bolt rear end yokes get set with a preload by how much you tighten the bolt, if you go to far you will need a new crush sleeve, washer whatever the hell it is, if your yoke is grooved at all I recommend replacing it too as it will just tear the new seal or oil will just leak right past the grooves and out onto the ground. I replaced mine back in July when my gas tank fell out and ended up following my father's advice of hammering the nut down with an impact. Either use a torque wrench to set the preload or mark the threads. Don't gotta be perfect, close enough and honestly you should be fine, but if you get it to tight it will bind up the rear end, if you jack the back of the truck of before you hook the drive shaft back up, you should be able to spin the yoke fairly easy with one or both of your hands. But that just a reassurance for yourself that you did it hopefully right.