90. make sure you get a good dial indicator!!! make sure you have a good magnetic base for it too!
TAKE YOUR TIME!! i cant emphasize this enough. make sure your gear pattern is correct, toe and heel! will you be using air tools? will it be on a lift? if no to these questions, make sure the azz end is up high in the air you you have a strong but not too long breaker bar or 1/2' ratchet! you are going to need to crush the crush sleeve pretty good doing it by hand. you are going to need access to a press so you can put your bearing(s) on. rule of thumb. if you are pressing the bearings on, make sure you put the RACE on the bearing so it gives equal pressure to the bearing when you are pressing it on the pinion or differential. if not, you can distort the bearing cage and ruin the bearing itself!!
here you go:
gear install
GOOD LUCK AND BE PATIENT!