I found a big difference between 4-lo and 4-hi when I was at Pismo Beach. For sand driving you get a lot more horsepower in 4-hi. 4-lo uses the transfer case which is great for more torque when you are rock crawling, but uses up precious horsepower at higher speeds. On sand you need all the horsepower you've got, so put it in 4-hi, select 1st or 2nd gear and slam the pedal down. That'll get you up a sand dune much faster.

YYYAAAAAAHHH!!!