If you have 4Auto you can use it virtually anytime. I switch mine to auto in bad weather, other than that Im usually in 2wd. You can feel it when you are in 4auto and floor it, it takes some uph away. Offroad I will use 2wd until I feel slip unless its real lose then 4x4hi or low, not auto.. Remember if you get stuck in 4x4, you are stuck. If you get stuck in 2wd you can dig yourself out most of the time.