Originally Posted by 3LiterBeater
Nope. You will need an air impact to get the pinion nut tight enough when reinstalling it though. Tq specs is something like 300 lb/ft... All you gotta go is pull the pinion nut and then pry the old seal out with a flat blade, be careful not to mess up the sealing surface on the housing and the put the new one in. It may take some careful tapping to get it in, just make sure its in straight and flush... I used some silicone lubricant on mine to get it to slide in and seal... Reinstall and your good to go. Be sure to top of fluid.
this statement is 100% incorrect!
list of parts you will need
one new pinion nut (ford)
one new crush washer (ford)
one new pinion seal (whoever)
maybe one bottle of axle fluid
you will need a torque wrench, DO NOT use a impact gun to tighten (preload) the pinion nut!
the crush washer is a "one time" use only part and can not be reused.
bob is somewhat correct with his comments.
get a manual and read what is says for adjusting the pinion pre-load.
its to long for me to type and i'm tired.