Tried my new Inchworm "Lefty" transfer case out in Moab last week. FMD, that thing is fun! Incredible control, especially going down a steep descent or coming off a large obstacle. Far superior to stock; can't imagine why Toyota didn't put a lower-geared transfer case in the FJC in the first place.
As a side note, it was my first time back to Moab in many many years, since before the trail system was developed or named. I lived there once upon a time (1977-78), but hardly recognized the place now - kind of sad, what was once a quiet sleepy friendly town is now overrun with traffic, tourists, hippies and commercialism. Oh well, progress I guess... at least the trails are still open for the most part.
Did Seven Mile Rim (including Wipeout Hill), Behind the Rocks, Strike Ravine, and Area BFE including the parts of Lower Helldorado still available from there. And some lesser trails. What a blast! Can't wait to go back. A few photos from trail buddies:
The Golden Crack. Lefty makes this ridiculously easy:
Down and up Wipeout Hill:
Don't remember which trail this was, but it was fun!
Lower Helldorado:
Verdict: two thumbs up for Lefty!

The only thing remotely like a complaint I have is that I have to shift between 4-low and 4-high more now; top practical speed in low range is only about 10 mph. Worth it for the extra low-speed control.