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224 STARTING AND OPERATING
Refer to “Shifting Procedures” in this section for
further information on shifting into 4H or 4L.
The instrument cluster alerts the driver that the
vehicle is in four-wheel drive, and the front and
rear driveshafts are locked together. The light
will illuminate when the transfer case is shifted
into the 4H position.
When operating your vehicle in 4L, the engine
speed will be approximately three times (four
times for Rubicon models) that of the 2H or 4H
positions at a given road speed. Take care not
to overspeed the engine.
Proper operation of four-wheel drive vehicles
depends on tires of equal size, type, and circum-
ference on each wheel. Any difference will
adversely affect shifting and cause damage to
the transfer case.
Because four-wheel drive provides improved
traction, there is a tendency to exceed safe
turning and stopping speeds. Do not go faster
than road conditions permit.
Shifting Procedures
2H To 4H Auto Or 4H Auto To 2H
Shifting between 2H and 4H Auto can be made
with the vehicle stopped or in motion. The
preferred shifting speed would be 0 to 45 mph
(72 km/h). With the vehicle in motion, the
transfer case will engage/disengage faster if
you momentarily release the accelerator pedal
after completing the shift. Do not accelerate
while shifting the transfer case. Apply a
constant force when shifting the transfer case
lever.
2H/4H Auto To 4H Part Time Or 4H Part Time To
2H/4H Auto
Shifting between 2H/4H AUTO to 4H PART TIME
can be made with the vehicle stopped or in
motion. The preferred shifting speed would be 0
to 45 mph (72 km/h). With the vehicle in
motion, the transfer case will engage/disen-
gage faster if you momentarily release the
accelerator pedal after completing the shift. Do
not accelerate while shifting the transfer case.
Apply a constant force when shifting the
transfer case lever.
NOTE:
Do not attempt to make a shift while only the
front or rear wheels are spinning. The front
and rear driveshaft speeds must be equal for
the shift to take place. Shifting while only the
front or rear wheels are spinning can cause
damage to the transfer case.
Delayed shifts out of four-wheel drive may be
experienced due to uneven tire wear, low or
uneven tire pressures, excessive vehicle
loading, or cold temperatures.
Shifting effort will increase with speed, this is
normal.
During cold weather, you may experience
increased effort in shifting until the transfer
case fluid warms up. This is normal.
4H Part Time/4H Auto To 4L Or 4L To 4H Part
Time/4H Auto
With the vehicle rolling at 2 to 3 mph (3 to
5 km/h), shift an automatic transmission into
NEUTRAL (N), or press the clutch pedal on a
manual transmission. While the vehicle is
coasting at 2 to 3 mph (3 to 5 km/h), shift the
transfer case lever firmly to the desired posi-
tion. Do not pause with the transfer case in N
(Neutral). Once the shift is completed, place the
automatic transmission into DRIVE or release
the clutch pedal on a manual transmission.
NOTE:
Shifting into or out of 4L is possible with the vehicle
completely stopped; however, difficulty may occur
due to the mating teeth not being properly aligned.
Several attempts may be required for clutch teeth
20_JL_OM_EN_USC_t.book Page 224
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