Four-Wheel Drive Operation (Command-Trac I Or Rock-Trac ); Operating Instructions/Precautions - Jeep Wrangler Owner's Manual

FOUR–WHEEL DRIVE OPERATION
(COMMAND-TRAC I OR
ROCK-TRAC )

Operating Instructions/Precautions

The transfer case provides four mode posi-
tions:
• 2H (Two-wheel drive high range)
• 4H (Four-wheel drive high range)
• N (Neutral)
• 4L (Four-wheel drive low range)
Four-Wheel Drive Shift Controls
194
The transfer case is intended to be driven in the
2H position for normal street and highway
conditions such as hard-surfaced roads.
In the event that additional traction is required,
the transfer case 4H and 4L positions can be
used to lock the front and rear driveshafts
together, forcing the front and rear wheels to
rotate at the same speed. This is accomplished
by simply moving the shift lever to one of these
positions. The 4H and 4L positions are in-
tended for loose, slippery road surfaces only
and not intended for normal driving. Driving in
the 4H and 4L positions on hard-surfaced
roads will cause increased tire wear and dam-
age to the driveline components.
The "4WD Indicator Light" (located in the in-
strument cluster) alerts the driver that the ve-
hicle 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.
NOTE:
Do not attempt to shift when only the front or
rear wheels are spinning. The transfer case
is not equipped with a synchronizer, and the
front and rear driveshaft speeds must be
equal for a shift to take place. Shifting while
only the front or rear wheels are spinning
can cause damage to the transfer case.
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
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 tendency to exceed safe
turning and stopping speeds. Do not go faster
than road conditions permit.