Ram 2021 3500 dually truck 2021 RAM 3500

User Manual - Page 153

For 2021 RAM 3500.

PDF File Manual, 456 pages, Download pdf file

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STARTING AND OPERATING 151
This electronically shifted transfer case is designed
to be driven in the two-wheel drive position (2WD)
for normal street and highway conditions on dry,
hard surfaced roads. Driving the vehicle in
two-wheel drive will have greater fuel economy
benefits as the front axle is not engaged in
two-wheel drive.
When additional traction is required, the transfer
ca
se 4WD High and 4WD Low positions can be
used to maximize torque to the front driveshaft,
forcing the front and rear wheels to rotate at the
same speed. This is accomplished by pushing the
desired position on the four-wheel drive control
switch.
For specific shifting instructions Ú page 152.
The 4WD High and 4WD Low positions are
d
esigned for loose, slippery road surfaces only.
Driving in the 4WD High and 4WD Low positions on
dry hard surfaced roads may cause increased tire
wear and damage to the driveline components.
NOTE:
The transfer case NEUTRAL button is located in the
ce
nter of the four-wheel drive Control Switch and is
pushed by using a ballpoint pen or similar object.
The transfer case N (Neutral) position is to be used
for recreational towing only
Ú page 222.
Transfer Case Position Indicator Lights
The Transfer Case Position Indicator Lights (4WD
Hi
g
h and 4WD Low) are located in the instrument
cluster and indicate the current and desired
transfer case selection. When you select a
different transfer case position, the indicator lights
will do the following:
If All Of The Following Shift Conditions Are Met:
1. The current position indicator light will turn
o
ff.
2. The selected position indicator light will flash
until the transfer case completes the shift.
3. When the shift is complete, the indicator light
for the selected position will stop flashing and
remain on.
If One Or More Of The Following Shift Conditions
Ar
e Not Met:
1. The indicator light for the current position will
remain on.
2. The newly selected position indicator light will
continue to flash.
3. The transfer case
will not shift.
NOTE:
Before retrying a selection, make certain that all
th
e necessary requirements for selecting a new
transfer case position have been met. To retry the
selection, push the current position, wait five
seconds, and retry selection. To find the shift
requirements
Ú page 152.
The “SVC 4WD Warning Light” monitors the
e
lectronic shift four-wheel drive system. If this light
remains on after engine start up or illuminates
during driving, it means that the four-wheel drive
system is not functioning properly and that service
is required.
NOTE:
Do not attempt to make a shift while only the front
or
rear wheels are spinning. This could cause
damage to driveline components.
WARNING!
Always engage the parking brake when powering
down the vehicle if the “SVC 4WD Warning Light”
is illuminated. Not engaging the parking brake
may allow the vehicle to roll which may cause
personal injury or death.
4
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