Originally Posted by No One
Unless my WK is weird, shift in neutral and stopped or moving under 5MPH. I have had it in 4LOW many times.
You can do it while it's stopped, but it may not work and it's not recommended to do it this way. The gears would have to be properly lined up for this method to work. I don't know the odds of the gears being lined up if you try it at a dead stop, but I'd guess it's 50%.
Ideally, you want the vehicle to be moving forward at 1-3mph. This allows the gears to be rotating very slowly so when it's shifted, the gears will continue moving very slowly and if the gears aren't originally lined up, they will eventually rotate enough to where they line up and allow the shift to occur.