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332 STARTING AND OPERATING
and damage to the driveline components. 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-whe
el 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
approxi
mately 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 o
f equal size, type, and circumference 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 te
ndency to exceed safe turning and stopping speeds. Do
not go faster than road conditions permit.
Shifting Procedures
2H To 4H Or 4H To 2H
Shifting between 2H and 4H 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
transfe
r case will engage/disengage faster if you momen-
tarily release the accelerator pedal after completing the shift.
D
o 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
shiftin
g until the transfer case fluid warms up. This is
normal.
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