Quadra-Trac Ii System - If Equipped; Selec-Terrain - If Equipped; Selec-Terrain Mode Selection - Jeep GRAND CHEROKEE L 2021 Owner's Manual

130 STARTING AND OPERATING
Q -T II S
UADRA RAC YSTEM
I E
F QUIPPED
The Quadra-Trac II System features two torque
transfer couplings. The couplings include an
Electronic Limited-Slip Differential (ELSD) rear axle
and the Quadra-Trac II transfer case. The ELSD
axle is fully automatic and requires no driver input
to operate. Under normal driving conditions, the
unit functions as a standard axle, balancing torque
evenly between left and right wheels. With a
traction difference between left and right wheels,
the coupling will sense a speed difference. As one
wheel begins to spin faster than the other, torque
will automatically transfer from the wheel that has
less traction, to the wheel that has traction. While
the transfer case and axle coupling differ in design,
their operation is similar.
SELEC-TERRAIN — IF EQUIPPED
S -T M S
ELEC ERRAIN ODE ELECTION
Selec-Terrain combines the capabilities of the
vehicle control systems, along with driver input, to
provide the best performance for all terrains. Tap
the toggle up or down to cycle through the
positions.
—
1 — Selec-Terrain Positions
2 — Selec-Terrain Toggle
Selec-Terrain consists of the following positions:
ROCK – Off-road calibration is only available in

4WD LOW. The vehicle is raised (if equipped
with air suspension) for improved ground clear-
ance. Traction-based tuning with improved
steerability for use on high traction off-road
surfaces. Use for low speed obstacles such as
large rocks, deep ruts, etc. If equipped with air
suspension, the vehicle level will change to
Off-Road 2. If the Selec-Terrain switch is in
ROCK mode, and the transfer case is switched
from 4WD LOW to 4WD HI, the Selec-Terrain
system will return to AUTO.
Selec-Terrain
SAND – Off-road calibration for use on low trac-

tion surfaces such as sand or wet grass. Drive-
line is maximized for traction. Some binding may
be felt on less forgiving surfaces. The electronic
brake controls are set to limit traction control
management of throttle and wheel spin. If
equipped with air suspension, the default ride
height for SAND is Normal Ride Height (NRH).
MUD – Off-road calibration for use on low trac-

tion surfaces such as mud. Driveline is maxi-
mized for traction. Some binding may be felt on
less forgiving surfaces. The electronic brake
controls are set to limit traction control manage-
ment of throttle and wheel spin. If equipped with
air suspension, the level will change to OR1.
SNOW – Tuning set for additional stability in

inclement weather. Use on and off-road on
loose traction surfaces such as snow. When in
SNOW mode (depending on certain operating
conditions), the transmission may use SECOND
gear (rather than FIRST gear) during launches,
to minimize wheel slippage. If equipped with air
suspension, the default ride height for SNOW is
Normal Ride Height (NRH).
AUTO – Fully automatic full-time four-wheel

drive operation can be used on and off-road.
Balances traction with seamless steering feel to
provide improved handling and acceleration
over two-wheel drive vehicles.