1972 Build thread.

[A1971Blazer]

Originally Posted by prorat56

Hey I would Like to give my input on you building your rears (I do at least 20 rear diff overhauls and gear changes a year at my shop) Start with the original shims!, set your back lash then check your pattern. I don't own a depth gauge but I have used them and don't like them and think you will be chasing your tail. The gear marking compound will be your friend. Well that's my 2 cents and I hope this helps and makes your job a bit easier.

I agree with this^^^^
The gears are manufactured to a particular dimension as far as spacing and center line are concerned.....but.....the housings are manufactured with certain
± tolerances as well...which may or may not be the exact same as what the gears are.
The last set I put in my 12 bolt...I set the depth to exactly what was marked on the pinion gear......it wasn't anywhere close when I checked the pattern...