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2-Wheel Drive
The engine, clutch and gearbox are usually mounted on the frame at
the front of the vehicle. The rotating motion produced by the
crankshaft at the front of the vehicle is transmitted either to the
two wheels at the rear (rear wheel drive), or the two wheels at the
front (front wheel drive). Some cars are manufactured with rear
mounted engines that drive the rear wheels, and front mounted engines
that drive the front wheels.
4 Wheel Drive
4-wheel drive vehicles use live front and rear drive axles. When
the front drive axle receives power from the transfer case, along
with the rear drive axle, the vehicle can function well on off-road
terrain (sand, rocks, mud, snow, etc.). A 4-wheel drive vehicle has
one drive axle that is automatically in use. The operator of the
vehicle has to activate and deactivate the second live drive axle.
All Wheel Drive (AWD)
All-wheel drive vehicles use live front and rear drive axles. When
the front drive axle receives power from the transfer case, along
with the rear drive axle, the vehicle can function well on off-road
terrain (sand, rocks, mud, snow, etc.). A 4-wheel drive vehicle has
one drive axle that is automatically in use. The operator of the
vehicle has to activate and deactivate the second live drive axle. An
all-wheel drive vehicle has both axles live at all times without
manually activating or deactivating axles.
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