Using the left stick, you can switch gears on the fly. While pushing forward move stick left (low), Middle (med) or right (high). You can also start off in one of those speeds by being in that position before pressing forward. Please note, going too fast could result in flipping over your truck.
Reverse Movement:
Using the left stick, you can switch gears on the fly. While pulling backwards move stick left (low), Middle (med) or right (high). You can also start off in one of those speeds by being in that position before pulling backwards. Please note, going too fast could result in jack-knife of your truck.
Using right stick press right to turn right and left to turn left while in motion.