Four-High (4H) Engage this setting when you’re on the highway and roads are sketchy – wet, snowy, icy. It’s also good for level, loose-gravel roads, packed sand or mud. Simply put, 4H is used for driving at normal speeds when you need extra traction, according to Popular Mechanics.Click to see full answer. Also know, when should I use 4 wheel drive? When to Use 4LO: When you need more torque (power) for heavy pulling at slow speeds. When you’re climbing steep grades at slow speeds and need extra power. When you’re descending steep hills with a heavy load-the low gearing provides engine braking assistance. Don’t use 4LO to get unstuck in mud and snow. Subsequently, question is, can you switch to 4wd while driving? There’s no need to ever use 4L four-wheel drive for highway driving. Also, in most vehicles, if you’re already on the road and the conditions suddenly change, you can switch to 4H four-wheel drive while you’re driving. This is not the case with 4L four-wheel drive, when you must slow down significantly or even stop. In this manner, is 4 wheel drive worth the extra money? Is AWD that much safer and worth the roughly $2,000 premium these systems command? The short answer is this: AWD and 4WD help a vehicle accelerate in slippery conditions, but they don’t aid with braking and only sometimes improve handling. That said, you shouldn’t necessarily cross the feature off your shopping list.When should you use 4 High and 4 Low? When to use “Low” If you’re driving under 15 mph and are trying to get out of a sticky spot, if you’re driving on an extremely slippery surface, if you’re trying to make a steep climb, or if you’re going through thick mud, sand or water — all great times to use 4×4 Low.
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