Jeep Grand Cherokee SRT 2018, Owner'S Manual, Page: 147 / 666

DRIVE (D)
This range should be used for most city and
highway driving. It provides the smoothest up-
shifts and downshifts, and the best fuel
economy. The transmission automatically up-
shifts through all forward gears. The DRIVE
position provides optimum driving characteris-
tics under all normal operating conditions.
When frequent transmission shifting occurs (such
as when operating the vehicle under heavy load-
ing conditions, in hilly terrain, traveling into strong
head winds, or while towing a heavy trailer), select
TOW mode (refer to “Selec-Track” in “Starting And
Operating”) or use the AutoStick shift control (refer
to “AutoStick” in this section for further informa-
tion) to select a lower gear. Under these condi-
tions, using TOW mode or a lower gear will
improve performance and extend transmission life
by reducing excessive shifting and heat buildup.
During extremely cold temperatures (-22°F
[-30°C] or below), transmission operation may
be modified depending on engine and transmis-
sion temperature as well as vehicle speed.
Normal operation will resume once the trans-
mission temperature has risen to a suitable
level.
SPORT (S)
The SPORT (S, +/-) position (beside the DRIVE
position) enables full manual control of transmis-
sion shifting (also known as AutoStick mode; refer
to “AutoStick” in this section for further informa-
tion). Toggling the gear selector forward (-) or
rearward (+) while in the SPORT (AutoStick) po-
sition will manually select the transmission gear,
and will display the current gear in the instrument
cluster.
Transmission Limp Home Mode
Transmission function is monitored electroni-
cally for abnormal conditions. If a condition is
detected that could result in transmission dam-
age, Transmission Limp Home Mode is acti-
vated. In this mode, the transmission may oper-
ate only in certain gears, or may not shift at all.
Vehicle performance may be severely degraded
and the engine may stall. In some situations, the
transmission may not re-engage if the engine is
turned off and restarted. The Malfunction Indi-
cator Light (MIL) may be illuminated. A message
in the instrument cluster will inform the driver of
the more serious conditions, and indicate what
actions may be necessary.
In the event of a momentary problem, the trans-
mission can be reset to regain all forward gears
by performing the following steps:
NOTE:
In cases where the instrument cluster message
indicates the transmission may not re-engage
after engine shutdown, perform this procedure
only in a desired location (preferably, at an
authorized dealer).
1. Stop the vehicle.
2. Shift the transmission into PARK, if possible.
If not, shift the transmission to NEUTRAL.
3. Push and hold the ignition switch until the
engine turns OFF.
4. Wait approximately 30 seconds.
5. Restart the engine.
6. Shift into the desired gear range. If the
problem is no longer detected, the transmis-
sion will return to normal operation.
NOTE:
Even if the transmission can be reset, we rec-
ommend that you visit an authorized dealer at
your earliest possible convenience. An autho-
rized dealer has diagnostic equipment to assess
the condition of your transmission.
If the transmission cannot be reset, authorized
dealer service is required.
When To Use TOW Mode
When driving in hilly areas, towing a trailer,
carrying a heavy load, etc., and frequent trans-
mission shifting occurs, select TOW mode, us-
ing the rotary switch on the center console.
Selecting TOW mode will improve performance
and reduce the potential for transmission over-
heating or failure due to excessive shifting.
Refer to “Selec-Track” in “Starting And Operat-
ing” for further information.
AutoStick
AutoStick is a driver-interactive transmission
feature providing manual shift control, giving
you more control of the vehicle. AutoStick allows
you to maximize engine braking, eliminate un-
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