i took the rear end out of my 57 3 months ago, i needed
2 shims one for each spider gear also needed a indicator
with a mag base and i had to make a tool to turn the
adjusting nut on the side bearings so i could adjust the
ring and pinion gear to take up some slop about .010
then i changed the front companion seal. when i ajusted
the ring and pinion i left it a little on the + side about .002
a total of .012 slop it had .022 the book calls .006-.010.
the shims were .010 the spiders had .022 slop. now
they have .012. check your slop a do not over tighten.
i used max spec because its old and you dont want them to
tight. with this adjustment there is very little backlash when
you grab the drive shaft and turn from side to side.you
also need a manual for step by step instructions.