Very important step to remember is to mark the zerks with something that won't rub off. If you lose your marks, remember that the zerks are not 45 degrees between the u joints, but off centered slightly. If you put them in incorrect you will not be able to grease them, probably not even if you drop the driveshaft. You will then have to pop the u joint out and give it a 1/4 turn and ponder whether you should re use the snap rings. Don't ask me how I know this.
