MANUAL HUBS!!!! It seems redundant to have a disconnect at the hub and the diff but to prevent premature wear of the cv-shafts and the diff seals, the best thing to do is keep the suckers from spinnin. Calmini sells a set and I'd bet that Sammy or tracker/kick units would work too. I'm currently swapping over because I don't want this to happen. Then I'll just fill my dif up to the factory setting.