Yeah its normal....from my experiences....in the manual you will find a section on appplying the 4HI and 4LO....it says you should be applying the 4X4 while in motion....I like to put it in Neutral first but I'm still moving.....4HI shouldn't be applied any faster than a bit below highway speeds and 4LO no faster than what you would do on a long residential driveway or school yard.
However that being said....I have had no problem applying either while sitting still....I always put it in Neutral first then make the change and put it back in a drive gear.
Try doing it while moving....if you still have a problem contact DC.
Hope this helps....read your manual....it may be more specific. Good luck and welcome to owning a KJ!!
