Four-wheel drive (4WD, 4x4)
Driver-selectable power to all four wheels, built for off-road and heavy-duty work.
Four-wheel drive powers all four wheels through a transfer case, usually with modes the driver selects: rear-drive for pavement, four-high for slippery roads, four-low for crawling off-road.
Where all-wheel drive optimizes for road traction automatically, 4WD optimizes for capability and toughness. It dominates pickups and body-on-frame SUVs, anything built to leave the pavement or pull serious weight.
From the data: Of the 19,491 trims in the Trimslate dataset, 3,054 are four-wheel drive.