I had to order a new switch after my wife drove the truck, thankfully mostly in a straight line 10 kms or so, in 4 low.
she had no idea because the lights only lit up if you hit them pretty hard. I tried to fix this but I couldnt make it work. the switch worked fine, the lights didnt.
she thought she F'd the truck and came inside pretty upset, thinking I'd be upset as whenever the truck breaks she driving it and I'm no where near it. lol.
anyways she got home and I told her to stop freaking out, if it's the transfercase, I have another one for it. relax.
I couldnt figure out how she put it in 4 low without slightly rolling and in neutral. it turns out if you hit 4 low and then shift the shifter from drive to reverse, when the selector briefly passes neutral, 4 low will absolutely engage and when you give it a little gas to go, it locks it in.
some beach!
anyways I made sure she understood all about 4 low and made sure she knew it was just an accident that really shouldn't have happened and showed her the procedure in the owners manual.
the transfercase turned out to be fine.