Dodge 2009 Ram Chassis Cab - Manual (Page 237)

This Electronically Shifted transfer case provides 5 mode
positions: 2-wheel drive (2WD), 4WD AUTO, 4WD
LOCK, NEUTRAL and 4WD LOW.
The Electronically Shifted transfer case is designed to be
driven in the 2 wheel drive position (2WD) or 4-wheel
drive position (4WD AUTO) for normal street and high-
way conditions (dry hard surfaced roads). Driving the
vehicle in 2WD will have greater fuel economy benefits,
as the front axle is not engaged in 2WD.
For variable driving conditions the 4WD AUTO mode
can be used. In this mode the front axle is engaged, but
the vehicle’s power is sent to the rear wheels. 4-wheel
drive will be automatically engaged when the vehicle
senses a loss of traction. Because the front axle is en-
gaged, this mode will result in lower fuel economy than
the 2WD mode.
When additional traction is required, the transfer case
4WD LOCK and 4WD LOW positions can be used to lock
the front and rear driveshafts together and force the front
and rear wheels to rotate at the same speed. This is
accomplished by rotating the 4WD Control Switch to the
desired position. Refer to “Shifting Procedure” for spe-
cific shifting instructions. The 4WD LOCK and 4WD
LOW positions are designed for loose, slippery road
surfaces only. Driving in the 4WD LOCK and 4WD LOW
positions on dry hard surfaced roads may cause in-
creased tire wear and damage to the driveline compo-
nents.
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