Replaced front diff, rear diff, and transfer case fluids. Tried to do a transmission fluid change, too, but ran into some problems. First the drain plug was completely rounded off and torqued down waaay past spec. Then I figured I'd just drop the whole pan instead, but couldn't figure out how to get the shift linkage bracket out of the way. So I ordered a set of nut extractors for the drain bolt, and think I might end up dropping the drive shaft to get access to the top mounting bolts for the shift linkage bracket, unless anyone else has a better idea how to get the pan down.