Many 4×4 trucks and SUVs have a separate shifter for choosing how power reaches the wheels. The settings are designed for different terrain.
2H, or two-high, is the standard mode for normal paved-road driving. It powers two wheels, typically the rear wheels. 4H, or four-high, engages four-wheel drive and is suited to dirt, mud, sand or ice.
The N on a transfer-case shifter is different from the vehicle’s regular neutral. Transfer-case neutral stops power from reaching the wheels and can be useful when towing a vehicle behind a motorhome.
4L, or four-low, is for serious off-roading, rock crawling, or navigating heavy mud and snow. It is not needed for ordinary driving.
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