Sure Grip issues

[Foghorn leghorn]

A few decades ago, I made the rounds and collected a pile of suregrips from local picNpulls. From the gleaned parts, I rebuilt several of those banged out cases;
I took them to my favorite local machine shop, who fixed the saddles up stronger than new. The cases were no longer a problem.
Finding good used guts, was.
After I cleaned up the cones, I restored the clearances with shims as was required, reset the cone-preloads to suit my combos. and then I stuck the reconditioned cases into various chunks from 2.76s to 4.30s, and from there into my cars, some of which were from 330 to 430 hp, and ran the crap out of them.
Some say that they are not rebuildable. ......... IDK what that's about. We recondition/rebuild 50/60/and 70 year old engines, transmissions , and carbs don't we? Com'on, compared to those, rearends are nothing.

I might still have one or two kicking around. Since yur practically next door, ............

I have spoken to a local recommended shop (Vogt Automotive) and they said they could rebuild the diff. If I run into any parts difficulties, I will gladly let you know!

 

[Dana67Dart]

Some say that they are not rebuildable

They are rebuildable just not as easily as replacing a set of clutch disk and plates.

 

[Big.J.007]

The cone types by design wear into the cases.. Can you shim and make em work, sure. Can you make them good as new... Well, that's very subjective. Once the pins eat up the case halves is it really cost effective to stay with the 2 pinion gear vs upgrading to the 4 pinion powr lok? Only you can decide that. If it was my $'s I'd find a good used powr lok and replace the clutches, short of catastrophic failure they are 100% rebuildable. I'd take strength and longevity over it'll sorta work and might hold up any day.