Sure grip

[Matt13]

Will a sure grip unit fit into my 8 3/4 rear with no issues? I have a 741 case. I can also pick up a rear with a 742 case if needed.

[anlauto]

I think you need the correct sure grip unit for the carrier you are using  there are differences in them.

[7212Mopar]

Take a look

http://www.mymopar.com/index.php?pid=62

Ask Dr. Diff and he can steer you to the right direction.

[Matt13]

I think you need the correct sure grip unit for the carrier you are using  there are differences in them.

Ok. This one came out of a 1970 B body, 489 case.

[anlauto]

Maybe it's just the bearings that are different ?

[Chryco Psycho]

to my knowledge all sure grip units fit in any carrier 

[RUNCHARGER]

Yes: The SG's interchange.

[Matt13]

Yes, confirmed by Dr. Diff. All I need is a shim kit and new bearings.

[MoparLeo]

The main difference in the different differentials is the pinion size, not the ring gear carrier. The 742 is prefered by a lot of people, even over the infamous 489. Which came with the Auburn style cone style sure-grip