From what I remember about the autohubs, there just isn't a lot of maintenance/rebuilding that you can do. Once they start to go, they are pretty much beyond saving, or the cost to 'fix' them is too steep to consider it.

I know you hate to hear it, but I think MLClark's advice was the best. Find another pair (either used auto hubs or the superwinches, or the factory manual hubs) and swap them in. It will save you a lot of aggravation in the long run. Just know that if you get a used pair of autohubs, you run the risk of having them go bad on you long before the manual hubs will wear out.

(I know, I spent a whole lot of time and some mechanic $$'s trying to salvage the autohubs on my 1988 trooper. In the end, I had to break down and buy a set of manual hubs...)