Low range will give you more torque. More torque on slippery road surfaces will be more likely to cause wheel spin. Wheel spin is the result of loss of traction which may result in loss of control. (especially on snow & ice) In general you won't want to use low range in snow or ice conditions.

I recommend watching the video linked below. It's only 7 minutes long and covers all the basics.
Land Rover Experience - Essential Guide to Off Road Driving - Snow - Part 4 of 5 - YouTube
 

Similar threads