what about the opposite? hi to lo? I guess that's not kosher either?
be back in awhile the suns going down gotta start the gen, start a fire, stuff like that
Generally there is no reason to shift it while moving. Stop, put the tranny in neutral, and then shift the txfer case. You can usually go back and forth between 2H and 4H without stopping, but don't try to shift into 4wd if you are stuck and the wheels are spinning!
When you use 4wd, you may experience a bind up situation trying to get it back into 2wd. The trick is back up slowly in an S-pattern which usually unwinds the tension (sounds stupid but it works).
And come to think of it, I'm not sure that the aluminum chain drive transfer case even has a PTO plate, and I'm not going out in the dark and crawl under our Suburban in the snow to find out
The old iron txfer cases (and the old 4 speed manual transmissions) had a plate about 4"x6" on one side. You can buy a PTO attachment that replaces this plate and has a counter shaft and gear that slides into a gear in the box that always turns in neutral. Then there would be a lever or cable control to slide the gear in and out, and of course another driveshaft that connects to whatever.
I put one of these on the transmission on my old C-60 GMC to run a hydraulic pump so I had to figure out how it all worked. Part of the driveshaft to the pump I made out of an old pole lamp
I cut a slot in the floorboard, bolted a short piece of small angle iron to the floor, and used one of those galvanized power pole x-piece braces for a lever
It was one of the best working PTO systems I've ever seen.