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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.
Part-time four-wheel drive vehicles frequently have a transfer case and no center differential, meaning, in many cases, the 4WD mode does not allow any difference in front and rear axle speeds. For normal road driving, these vehicles are shifted into 2WD mode, to prevent damage to the transfer case.
These are very similar to the Quadra-Trac NP219 transfer case described in the next section below. The differences are 1) they added a 2WD mode for fuel savings and 2) the 2WD-to-4WD modes were controlled via a vacuum switch on the dashboard. The Hi-N-Lo range selection was still performed using a shift lever on the console.
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 ...
In June 1981, Mitsubishi released 4WD versions of the pickup and cab chassis, both with the 2.0-litre motor. [19] Free-wheeling hubs to reduce noise and fuel use in 2WD mode were optional. [14] In late 1981, the 2.0-litre with five-speed manual was made optional for the 2WD one-tonne suspension models. [20]
Both 2WD and 4WD models were offered, as well as half-ton and three-quarter-ton ("1500" and "2500") models. The GMT400 series introduced an independent front suspension. The 2WD models used coil springs and 4WD models used torsion bars in the front suspension. All models used a live axle and leaf springs in the rear. The GMT400-series Suburbans ...
A 2WD 5 speed transmission found in most light duty Toyota Dyna trucks, this transmission has a drum brake on the rear and steel housings. These transmissions can be used to give a significantly lower first, and a slightly higher overdrive (5th: 0.695:1) when fitted to an R151 4WD gearbox. [4] First Gear: 5.147:1; Second Gear: 2.74:1; Third ...