Originally Posted by big_ole_truck
Shifting into 4x4 LO can only be done at a complete stop but you can switch in and out of 4x4 HI up to 45 mph (or was it 55 mph?). It's in the owner's manual.
I don't think you can shift into 4lo at a dead stop. I seem to remember I was unable to do it. You can shift at any speed at any time. The computer will decide when the shift happens.
From 2x to 4Hi and back, I did it at 20mph. I just stayed off the gas during the shift. Cruised on a dirt road up to 45mph.
As for 4 lo, dash says slow to 3mph to shift. If the shift doesn't happen, gotta speed up again. Shifting out of is the same way. slow to 3mph.