Dodge WC series
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The Dodge WC series is a prolific range of light 4WD and medium 6WD military utility trucks, produced by Chrysler under the Dodge and Fargo marques during World War II. Together with the 1⁄4-ton jeeps produced by Willys and Ford, the Dodge 1⁄2‑ton G-505 and 3⁄4‑ton G-502 trucks made up nearly all of the light 4WD trucks supplied to the U.S. military in WWII – with Dodge contributing some 337,500 4WD units.
The most produced variants in the range were the 3⁄4-ton, 4×4, WC-51 and WC-52 Weapons Carriers – shown a WC-51: short front bumper, without winch.
The "Ben Hur" 1-ton, 2-wheel cargo-trailer was frequently mated to the WC series trucks.
1934 K-39-X-4(USA) – Dodge's first military 4x4 truck
The initial Dodge VC-series, half-ton military 4x4s, were based on the 1939 T-series like this
Four-wheel drive
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A four-wheel drive, also called 4×4 or 4WD, is a two-axled vehicle drivetrain capable of providing torque to all of its wheels simultaneously. It may be full-time or on-demand, and is typically linked via a transfer case providing an additional output drive shaft and, in many instances, additional gear ranges.
The Jeep Wrangler (pictured is a TJ Wrangler) is a 4WD vehicle with a transfer case to select low-range or high-range four-wheel drive.
Center transfer case sending power from the transmission to the rear axle (right) and front axle (left)
The Lamborghini Murciélago is an AWD that powers the front via a viscous coupling unit if the rear slips
The HMMWV is a 4WD/AWD that powers all wheels evenly (continuously) via a manually lockable center differential, with Torsen differentials for both front and rear