Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Following!
Sorry, that was a typo. They are both 28 spline. I'll fix OP. Looking around the net, with a very few exceptions Axles and diffs have all the same spline "pitch". I'll know as soon as I pick up an 8.8 rear end.
My guess is to replace the 8.25 front diff. It's a known weak component and not much (if anything?) in the way of aftermarket upgrades available. I recall seeing others try a 3/4 ton (2500) swap, which I beleive turned out to be extremely difficult. I'm very interested in the OP's results.
I believe Eaton still makes aftermarket units even though Eaton still makes alot of the OEM units for GM. I use to work for Eaton Cutler Hammer electrical division and that was a very good company to work for. As an employee you could "order" any Eaton product (even rearends) from any Eaton Division and they would put it on a truck route to your factory and you paid zero shipping and got the part, unit, system, whatever AT COST! They made generators, PLC's, UPS's, Automotive stuff, circuit breakers, breaker panels, you name it. This was back in 2005-2006.
