CLEARANCE
Know how much clearance you have under your vehicle. Usually, your differentials are the lowest part. Know whether they are offset to one side or in the middle of the axle. If you encounter a rock or other obstacle in the trail that is higher than your differentials, consider going around it, or drive over it by putting your wheels directly on the obstacle.
Use the increased clearance of your 4WD to your advantage, but if it appears there is not enough clearance, carefully pick a course of travel that puts your tires on the high spots. Make certain that when your wheel drops off the object you have enough clearance from the rocker panels. The objective is to smoothly cross the obstacle without scraping any part of the vehicle.
WASHBOARDS Roads with washboards can be brutal on your nerves and your equipment. A washboard is caused by the slight slipping of wheels under torque or braking, which causes small ridges in the dirt. Driving at high speeds can be very dangerous. Driving faster over it might feel smooth, but this is because the tires are skipping from ridge to ridge. It will eventually feel like you are driving a hovercraft and can cause loss of control. You may find a speed that is fast and smooth, but driving like this for long periods or on a routine basis will eventually vibrate your vehicle to pieces. You also dramatically increase your chance of tire failure. Slower speeds will help you maintain traction and will be a lot easier on your vehicle. Remember, mechanical sympathy! The Driving Company
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