3730 miles. Removed AT pan, drained 4+ quarts of clean-looking red-colored ATF, replaced filter, and filled with 4+ quarts of RedLine C+ ATF.
Red Line Synthetic Oil - Automatic Transmission Fluids - C+ ATF
Drained Quadra-Trac II 2-speed t-case and refilled with RL C+. The drained oil had what seemed to me to be a lot of metallic powder in it. In fact it looked like dark-red metallic paint.
The diffs, AT, and t-case now contain fully-synthetic, extra-hi-quality, polyol-ester-basestock RedLine oils in them. Red Line doesn't list a power-steering fluid, so I guess I'll leave the original in. Have a couple cases of RL 5W20 coming for the engine.