Ram 2021 3500 dually truck 2021 RAM 3500

User Manual - Page 157

For 2021 RAM 3500.

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STARTING AND OPERATING 155
2WD TO 4WD HIGH
Push the desired position on the four-wheel drive
control switch to shift the transfer case. Shifts
between two-wheel drive and 4WD High can be
done with the vehicle stopped or in motion. With
the vehicle in motion, the transfer case will
engage/disengage faster if you momentarily
release the accelerator pedal after turning the
control switch. If the vehicle is stopped, the ignition
switch must be in the ON position with the engine
either running or off. This shift cannot be
completed if the ignition switch is in the ACC
position.
NOTE:
The four-wheel drive system will not allow shifts
be
tween 2WD/4WD High if the front and/or rear
wheels are spinning (no traction). In this situation,
the selected position indicator light will flash and
the original position indicator light will remain on.
At this time, reduce speed and stop spinning the
wheels to complete the shift.
2WD OR 4WD HIGH TO 4WD LOW
NOTE:
When shifting into or out of 4WD Low some gear
noi
se may be heard. This noise is normal and is not
detrimental to the vehicle or occupants.
Shifting can be performed with the vehicle rolling
2 to 3 mph (3 to 5 km/h) or completely stopped.
Y
ou can use either of the following procedures:
Preferred Procedure
1. With the engine running, slow the vehicle to
2
to 3 mph (3 to 5 km/h).
2. S
hift the transmission into NEUTRAL.
3. While still rolling, push the desired position on
t
he transfer case control switch.
4. After the desired position indicator light is on
(not flashing), shift the transmission back into
gear.
Alternate Procedure
1. B
ring the vehicle to a complete stop.
2. With the ignition switch in the ON position and
t
he engine running, shift the transmission into
NEUTRAL.
3. Push the desired position on the transfer case
c
ontrol switch.
4. After the desired position indicator light is on
(not flashing), shift the transmission back into
gear.
NOTE:
If Steps 1 or 2 of either the Preferred or Alter-
nate Procedure are not satisfied prior to
at
tempting the shift, then the desired position
indicator light will flash continuously while the
original position indicator light is on, until all
requirements have been met.
The ignition switch must be in the ON position
for a shift to take place and for the position indi-
cator lights to be operable. If the ignition switch
i
s not in the ON position, the shift will not take
place and no position indicator lights will be on
or flashing.
MANUALLY SHIFTED TRANSFER CASE
I
F EQUIPPED
The transfer case provides four mode positions:
Two-Wheel Drive High Range (2H)
Four-Wheel Drive Lock High Range (4H)
N (Neutral)
Four-Wheel Drive Low Range (4L)
For additional information on the appropriate use
of
each transfer case mode position, see the
information below:
2H
Two-Wheel Drive High Range — This range is for
n
ormal street and highway driving on dry, hard
surfaced roads.
4H
Four-Wheel Drive Lock High Range — This range
l
ocks the front and rear driveshafts together
forcing the front and rear wheels to rotate at the
same speed. Additional traction for loose, slippery
road surfaces only.
4
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