or worse still starts to change then gets stuck in transfer neutral and you don't go anywhere.......happened to me kuckily I wasn't far from my Indy garage and they came to recover me, the transfer box motor was duff, replaced the motor and the box selected Hi range ok again, still won't move into Lo range tho, looks like my xfer box ecu has also gone, I stick the transmission in 1st gear and drive SLOOOOOW when off road, seems to work ok although Lo box is recommended for steep hill climbs and decents .