Eight-Speed Automatic Transmission - Jeep Grand Cherokee 2020 Owner's Manual

190 STARTING AND OPERATING
Fuel Economy Mode Switch (SRT Model)
When the Fuel Economy (ECO) Mode is
engaged, the vehicle control systems will
change the following:
The transmission will upshift sooner and

downshift later.
The overall driving performance will be more

conservative.
Vehicles with Quadra-Lift air suspension will

operate in "Aero" mode over a broader speed
range. Refer to the section on Quadra-Lift for
further information.
In SRT models, the transmission will launch

(from a stop) in second gear, and the torque
converter clutch may engage at lower engine
speeds and remain on longer.
Some ECO mode functions may be tempo-

rarily inhibited based on temperature and
other factors.
Active Noise Cancellation — If Equipped
Your vehicle is equipped with an Active Noise
Cancellation System. This system uses four
microphones embedded in the headliner to
detect undesirable exhaust noise, which
sometimes occurs when operating in specific
driving conditions such as ECO and Tow mode.
An onboard frequency generator creates
counteracting sound waves through the audio
system to help keep the vehicle quiet.
Eight–Speed Automatic Transmission
The transmission gear range is displayed both
beside the gear selector and in the instrument
cluster. To select a gear range, press the lock
button on the gear selector and move the
selector rearward or forward. To shift the
transmission out of PARK (P), the engine must
be running and the brake pedal must be
pressed. You must also press the brake pedal to
shift from NEUTRAL (N) into DRIVE (D) or
REVERSE (R) when the vehicle is stopped or
moving at low speeds. Select the DRIVE range
for normal driving.
NOTE:
In the event of a mismatch between the gear
selector position and the actual transmission
gear (for example, driver selects PARK while
driving), the position indicator will blink continu-
ously until the selector is returned to the proper
position, or the requested shift can be
completed.
The electronically-controlled transmission
adapts its shift schedule based on driver inputs,
along with environmental and road conditions.
The transmission electronics are
self-calibrating; therefore, the first few shifts on
a new vehicle may be somewhat abrupt. This is
a normal condition, and precision shifts will
develop within a few hundred miles
(kilometers).
Only shift from DRIVE to PARK or REVERSE
when the accelerator pedal is released and the
vehicle is stopped. Be sure to keep your foot on
the brake pedal when shifting between these
gears.