8 3/4 is this correct

Being a tad over using green bearings won't hurt.
But if going with OEM bearings then things need to be righter because you are going to be adjusting the end play by thousands of an inch. So if one axle tubes is an 1/4 off of the other things are not going to work so good.
Dr. Diff is the man to work with. He will do you right.

So you think the factory axles were somehow sized for individual housings?

Uh, no. They had tapered bearings, the axle housings weren’t all identical, and the axles still worked for 50 years.

And it’s just as likely the housing isn’t off by that much. It’s a tape measure, not a laser. If it’s sagging a little, at a slight angle, or if the end catch is a little loose there’s your extra.


No! No no no no!

This chart is horrible. It’s full of inaccurate information. There are 5 different width B-body housing. 5.

The A body 8 3/4 is wider than the A-body 7.25’s and 8.25’s by over an inch. That chart is just wrong, and yet people still post that garbage.

There’s a perfectly good list right on this site, stickied in the drivetrain section.

An accurate 8 3/4" rear axle width list