Based
on construction there are two types:
• Part time four wheel drive
• Fulltime four wheel drive
Part
time four wheel drive:
• Usually, when car makers say that a
car has four-wheel drive, they are referring to a
part-time system
• The transfer case on a part-time
four-wheel-drive system locks the front-axle driveshaft to
the rear-axle
driveshaft
Part-time
systems like this should only be used in low -traction situations such as
off-road
or on snow or ice
On
dry concrete or good roads, the
four-wheel drive should be disengaged in order to
avoid high fuel consumption
and extra wear on the tires and drive train
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