[EFI70Blazer]

Originally Posted by cooters

when changing center sections, you will not likely use the same shims. Use a die grinder on the inside of your old bearings so they slide on and off easy and find the shim stack you need to get the correct pattern. Do you have the correct series of posi ( 2,3, or 4 series) for the ratio of the gears?

If you are doing a Dana setup then grinding the inside of your old bearings is a good idea to keep from having to pressing and pulling off your bearings to change backlash. This is only a good idea if you are using new bearings for your final setup.

If you are doing a 10 or 12 bolt chevy setup the shims are on the outside of bearings and this step is not needed.

This process could also be used for pinion depth when you will be using new bearings for final setup.