Don't remember where I saw it but someone installed/shimmed set of the set up Cen diffs offered on SaV Central in a 6S Flux. Then he tried to break them and couldn't by just running/jumping. He finally did succeed - holding it WOT and throwing it on the ground, just took 9 tries, IIRC. It broke tooth off pinion.

He's updated the prices on Sav Central for the ready to drop in setups. They're $20 more than what I quoted above. He said he's no longer buying Ebay, but all new and thats reason for the increase.

I'm waiting on ground to get dried out (9.4" rain in 4hrs 2 days ago) and will start running 6S in my Flux and if I have trouble with diffs, I'll pop for a set of his ready to go Cen diffs.

I had diff probs with my old SS4.6 and was never able to completely fix, just made them last longer - alum bulks, alum cups, and alum diff cases. It would still kill that small brg on the ring gear every so often, but was better that stripping ring gears.