Get a Shiftster for now, $60
If you have, or can install, manual hubs then you can leave Shiftster/transfer case in 4high
With hubs unlocked you are in 2WD, lock the hubs for 4high
If you have, or can install, manual hubs then you can leave Shiftster/transfer case in 4high
With hubs unlocked you are in 2WD, lock the hubs for 4high