For those wondering how the diff mod with the extra bearing holds up I can say it's worth it. I had close to 10 hours run time on my front diff and it was still a 1/4 full. Action was still good but I new the oil would be nasty. Cleaned it refilled it. No significant wear on the bushing. Just replaced the seals on the outdrive and called it good. Even the washer under the sun gear was fine. I'll probably have to wear out the teeth on diff housing before replacing it.
now to read up some more on that Durango I have coming