[Mike C]

On my Jimmy I converted to 8 lug axles from a 3/4 ton Suburban. 4.10 gears and a semi-float 14 bolt in the rear. I found the Sub for $300. After breaking 12 bolts a half-a-dozen times it was time for more beef. Should have done this in the late 80’s when I re-geared the 1/2 ton axles.

My kid’s Jimmy project we did the same. His is a TH350 and the $200 3/4 parts Sub had 3.73. Both trucks running 35” tires.

For $2000 you should be able to get a set of CUCV axles. Full float 14 rear most likely with a Detroit and a Dana 60 front. 4.57 gears are the norm.

Yes, you can rebuild diffs without setting up the gear set again. This is a fairly straight forward project for the competent DIY’er. It is possible to cut old pinion bearing off and use a drift (pipe) to drive the new pinion bearing on. A press makes this job easier along with a bearing separator.

I would go for the used axles for $500 if it were my money, but I agree that you would really like more gear with an OD trans. But many 2500HD’s with the 6.0 run 33” or even 35” tires with no problems.