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Most road vehicles use a 2WD layout due to its lightweight and simplicity. Traction on the road is usually sufficient that the driving force can be reliably transmitted through only two wheels. For vehicles that have part-time four-wheel drive, the term refers to the mode when 4WD is deactivated and power is applied to only two wheels.
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.. A four-wheel drive, also called 4×4 ("four by four") or 4WD, is a two-axled vehicle drivetrain capable of providing torque to all of its wheels simultaneously.
2H: 2WD, high range. 100% of available power is sent to the rear axle. 4H: 4WD, high range. Power is sent to both the front and rear axles while the centre differential remains unlocked. 4HLc: 4WD, high range, locked centre differential. Power is sent to the front and rear axles with the centre differential locked, ensuring that a percentage of ...
The NP242 Selec-Trac transfer case debuted alongside the Fuel-Injected 4.0L Inline-6 in the compact Jeep Cherokee in 1987. The shifter has modes 2WD - 4WD Hi Part-Time - 4WD Hi Full-Time - N - 4WD Low. There is a center differential that is open in 4WD Hi Full-Time mode and distributes torque 48/52% front-to-rear.
Hybrid models were available with part-time four-wheel drive, which Toyota refers to as 4WD-i whereby the rear wheels are powered by a separate electric motor. This system is intended for use on snow and ice and is prone to overheating the rear electric motor off-road.
In automotive design, an F4, or front-engine, four-wheel drive (4WD) layout places the internal combustion engine at the front of the vehicle and drives all four roadwheels. This layout is typically chosen for better control on many surfaces, and is an important part of rally racing, as well as off-road driving.
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The original quattro centre differential (1980). Volkswagen Group has been developing four-wheel drive (4WD) systems almost since its inception during the Second World War.The Volkswagen Kübelwagen, Volkswagen Schwimmwagen, and Volkswagen Kommandeurswagen were all military vehicles which required all four road wheels to be "driven", the latter being a 4WD Volkswagen Beetle.