Jeep Wrangler2018 Owner's Manual page 318

316 STARTING AND OPERATING
For additional information on the appropriate use of each
transfer case mode position, see the information below:
2H
Rear Wheel Drive High Range — This range is for normal
street and highway driving on dry, hard surfaced roads.
4H
Four-Wheel Drive High Range — This range maximizes
torque to the front driveshaft, forcing the front and rear
wheels to rotate at the same speed. This range provides
additional traction for loose, slippery road surfaces only.
NEUTRAL (N)
Neutral — This range disengages both the front and rear
driveshafts from the powertrain. To be used for flat towing
behind another vehicle. Refer to "Recreational Towing" in
"Starting And Operating" for further information.
4L
Four-Wheel Drive Low Range — This range provides low
speed four-wheel drive. It maximizes torque to the front
driveshaft, forcing the front and rear wheels to rotate at the
same speed. This range provides additional traction and
maximum pulling power for loose, slippery road surfaces
only. Do not exceed 25 mph (40 km/h).
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. The 4H and 4L positions are
intended 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 damage to the driveline components. Refer to
"Shifting Procedures" in this section for further informa-
tion 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.