2023 JEEP COMPASS power transfer unit

112STARTING AND OPERATING
5. Restart the engine.
6. Shift into the desired gear range. If the problem is no longer detected, the
transmission will return to normal operation.
NOTE:Even if the transmission can be reset, we
recommend that you visit an authorized dealer at
your earliest possible convenience. An authorized
dealer has diagnostic equipment to assess the
condition of your transmission. If the transmission
cannot be reset, authorized dealer service is
required.
TORQUE CONVERTER CLUTCH
A feature designed to improve fuel economy has
been included in the automatic transmission on
your vehicle. A clutch within the torque converter
engages automatically at calibrated speeds. This
may result in a slightly different feeling or response
during normal operation in the upper gears. When
the vehicle speed drops or during some
accelerations, the clutch automatically
disengages.
NOTE:The torque converter clutch will not engage until
the engine and/or transmission is warm (usually
after 1 to 3 miles [2 to 5 km] of driving). Because
the engine speed is higher when the torque
converter clutch is not engaged, it may seem as if the transmission is not shifting properly when the
vehicle is cold. This is normal. The torque converter
clutch will function normally once the powertrain is
sufficiently warm.
FOUR-WHEEL DRIVE OPERATION —
IF EQUIPPED
JEEP® ACTIVE DRIVE
Your vehicle may be equipped with a Power
Transfer Unit (PTU). This system is automatic
with no driver inputs or additional driving skills
required. Under normal driving conditions, the
front wheels provide most of the traction. If the
front wheels begin to lose traction, power is shifted
automatically to the rear wheels. The greater the
front wheel traction loss, the greater the power
transfer to the rear wheels.
Additionally, on dry pavement under heavy throttle
input (where one may have no wheel spin), torque
will be sent to the rear in a preemptive effort to
improve vehicle launch and performance
characteristics.
Four-Wheel Drive (4x4)
The four-wheel drive (4WD) is fully automatic in
normal driving mode.
NOTE:It is not possible to carry out the change of mode
when the vehicle exceeds the speed of 75 mph
(120 km/h).

4WD Buttons

Enabling Four-Wheel Drive (4x4)
The buttons for the activation of four-wheel drive
are located on the center console and allow you to
select the following:
4WD LOCK
4WD LOW — (Trailhawk models only)
CAUTION!
All wheels must have the same size and type
tires. Unequal tire sizes must not be used.
Unequal tire size may cause failure of the Power
Transfer Unit.
1 — 4WD LOW (Trailhawk models only)
2 — 4WD LOCK

22_MP_OM_EN_USC_t.book Page 112

STARTING AND OPERATING113
Active Drive Control — If Equipped
The Power Transfer Unit (PTU) is locked to ensure
immediate availability of torque to the rear drive
axles. This feature is selectable in AUTO mode and
automatic in the other driving mode. 4WD LOCK
can be enabled by the following ways:
When the 4WD LOCK button is pushed.
When the Selec-Terrain switch is moved from
AUTO to any other off-road modes.
Active Drive With Low Control — (Trailhawk models
only)
The 4WD LOW mode helps to improve the off-road
performance in all modes. To enable 4WD LOW,
please follow the steps below:
Enabling 4WD LOW
With the vehicle stationary, the ignition in the ON/
RUN position or with the engine running, shift the
transmission into NEUTRAL and push the 4WD
LOW button once. The instrument cluster will
display the message “4WD LOW” once the shift is
complete.
NOTE:
Both LOCK and LOW LED lights will blink and
then become active on the buttons until the
shift is complete.
The instrument cluster display will illuminate the
4WD LOW icon. Disabling 4WD LOW
To disable the 4WD LOW mode, the vehicle must
be stationary and the transmission shifted into
NEUTRAL. Push the 4WD LOW button once.
SELEC-TERRAIN — IF EQUIPPED
Selec-Terrain combines the capabilities of the
vehicle control systems, along with driver input, to
provide the best performance for all terrains.
MODE SELECTION GUIDE

Selec-Terrain Switch

AUTO
: This four-wheel drive operation is a
continuous operation, is fully automatic and can
be used on and off road. This mode balances
traction to ensure maneuverability and acceler -
ation improvement compared to a vehicle with
two wheel drive. This mode also reduces fuel consumption, since it allows the disconnect of
the drive shaft where conditions permit.
SNOW
: This mode allows you to have greater
stability under conditions of bad weather. For
use on and off road on surfaces with poor trac-
tion, such as roads covered with 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.
SAND/MUD : For off-road driving or use on
surfaces with poor traction, such as dry sand
and roads covered by mud or wet grass. The
transmission is set to provide maximum trac -
tion.
ROCK : (Trailhawk only): This mode is only avail -
able in 4WD LOW range. The device sets the
vehicle to maximize traction and allow the
highest steering capacity for off-road surfaces.
This mode gives you the maximum performance
off-road. Use for low speed obstacles such as
large rocks, deep ruts, etc.
SPORT : This mode is only available in 4WD
AUTO, and alters the transmission's automatic
shift schedule for sportier driving. Upshift
speeds are increased to make full use of avail -
able engine power. Suspension settings are
optimized and steering assist is modified to
provide better handling performance.
4

22_MP_OM_EN_USC_t.book Page 113

STARTING AND OPERATING161
RECREATIONAL TOWING — 4X4
M
ODELS
Recreational towing (with all four wheels on the
ground, or using a towing dolly) is NOT ALLOWED.
This vehicle may be towed on flatbed or vehicle
trailer provided all four wheels are OFF the ground.
DRIVING TIPS
ON-ROAD DRIVING TIPS
Utility vehicles have higher ground clearance and a
narrower track to make them capable of
performing in a wide variety of off-road
applications. Specific design characteristics give
them a higher center of gravity than conventional
passenger cars.
An advantage of the higher ground clearance is a
better view of the road, allowing you to anticipate
problems. They are not designed for cornering at
the same speeds as conventional passenger cars
any more than low-slung sports cars are designed
to perform satisfactorily in off-road conditions.
Avoid sharp turns or abrupt maneuvers. As with
other vehicles of this type, failure to operate this
vehicle correctly may result in loss of control or
vehicle rollover.
OFF-ROAD DRIVING TIPS
When To Use 4WD LOW Range
When off-road driving, shift to 4WD LOW for
additional traction and control on slippery or
difficult terrain, ascending or descending steep
hills, and to increase low-speed pulling power
Ú page 112. This range should be limited to extreme situations such as deep snow, mud, or
sand where additional low speed pulling power is
needed. Vehicle speeds in excess of 25 mph
(40 km/h) should be avoided when in 4WD LOW
range.
Driving Through Water
Although your vehicle is capable of driving through
water, there are a number of precautions that
must be considered before entering the water:
Driving through water more than a few inches/
centimeters deep will require extra caution to
ensure safety and prevent damage to your vehicle.
If you must drive through water, try to determine
the depth and the bottom condition (and location
of any obstacles) prior to entering. Proceed with
caution and maintain a steady controlled speed
less than 5 mph (8 km/h) in deep water to
minimize wave effects.
CAUTION!
Towing with the front wheels on the ground
will cause severe transmission damage.
Damage from improper towing is not covered
under the New Vehicle Limited Warranty.
Ensure that the Electric Park Brake is
released, and remains released, while being
towed.
Do not use a bumper mounted clamp-on tow
bar on your vehicle. The fascia/bumper face
will be damaged.
CAUTION!
Towing this vehicle with ANY of its wheels on the
ground can cause severe transmission and/or
power transfer unit damage. Damage from
improper towing is not covered under the
New Vehicle Limited Warranty.
CAUTION!
When driving through water, do not exceed
5 mph (8 km/h). Always check water depth
before entering as a precaution, and check all
fluids afterward. Driving through water may
cause damage that may not be covered by the
New Vehicle Limited Warranty.
4

22_MP_OM_EN_USC_t.book Page 161

162STARTING AND OPERATING
Flowing Water
If the water is swift flowing and rising (as in storm
run-off) avoid crossing until the water level recedes
and/or the flow rate is reduced. If you must cross
flowing-water, avoid depths in excess of 9 inches
(22 cm). The flowing water can erode the
streambed causing your vehicle to sink into deeper
water. Determine exit point(s) that are downstream
of your entry point to allow for drifting.
Standing Water
Avoid driving in standing water deeper than
16 inches (40.5 cm), and reduce speed
appropriately to minimize wave effects. Maximum
speed in 16 inches (40.5 cm) of water is less than
5 mph (8 km/h).
(Trailhawk only): Avoid driving in standing water
deeper than 19 inches (48 cm), and reduce speed
appropriately to minimize wave effects. Maximum
speed in 19 inches (48 cm) of water is less than
5 mph (8 km/h).
Maintenance
After driving through deep water, inspect your
vehicle fluids and lubricants (engine, transmission,
Power Transfer Unit, and Rear Drive Module) to
ensure they have not been contaminated.
Contaminated fluids and lubricants (milky, foamy
in appearance) should be flushed/changed as
soon as possible to prevent component damage.
Driving In Snow, Mud And Sand
In heavy snow, when pulling a load, or for
additional control at slower speeds, shift the
transmission to a low gear and shift the 4WD
system to the appropriate terrain mode, using
4WD LOW if necessary Úpage 112. Do not shift to
a lower gear than necessary to maintain headway.
Over-revving the engine can spin the wheels and
traction will be lost.
Avoid abrupt downshifts on icy or slippery roads
because engine braking may cause skidding and
loss of control.
Hill Climbing
NOTE:Before attempting to climb a hill, determine the
conditions at the crest and/or on the other side.
Before climbing a steep hill, shift the transmission
to a lower gear and shift the 4WD System to 4WD
LOW. Use FIRST gear and 4WD LOW for very steep
hills.
NOTE:Brakes should be applied at increased slippage,
but before coming to a stop to avoid digging into
the loose surface and rendering the operator of the
vehicle stuck/immobile. If you stall or begin to lose headway
while climbing
a steep hill, allow your vehicle to come to a stop
and immediately apply the brakes. Once stopped,
shift to REVERSE. Back slowly down the hill
allowing the compression braking of the engine to
help regulate your speed. If the brakes are
required to control vehicle speed, apply them
lightly and avoid locking or skidding the tires.
NOTE:Remember, never drive diagonally across a hill -
drive straight up or down.
If the wheels start to slip as you approach the crest
of a hill, ease off the accelerator and maintain
headway by turning the front wheels slowly left and
right. This may provide a fresh “bite” into the
surface and may provide traction to complete the
climb.
WARNING!
If the engine stalls or you lose headway or
cannot make it to the top of a steep hill or grade,
never attempt to turn around. To do so may
result in tipping and rolling the vehicle. Always
back straight down a hill in REVERSE gear
carefully. Never back down a hill in NEUTRAL
using only the brake.

22_MP_OM_EN_USC_t.book Page 162

SERVICING AND MAINTENANCE313
(Continued)
TIRE ROTATION RECOMMENDATIONS
The tires on the front and rear of your vehicle
operate at different loads and perform different
steering, handling, and braking functions. For
these reasons, they wear at unequal rates.
These effects can be reduced by timely rotation of
tires. The benefits of rotation are especially
worthwhile with aggressive tread designs such as
those on On/Off Road type tires. Rotation will
increase tread life, help to maintain mud, snow,
and wet traction levels, and contribute to a
smooth, quiet ride.
For the proper maintenance intervals Úpage 268.
The reasons for any rapid or unusual wear should
be corrected prior to rotation being performed. The suggested rotation method is the “forward
cross” shown in the following diagram. This
rotation pattern does not apply to some directional
tires that must not be reversed.

Tire Rotation (Forward Cross)

CAUTION!
To avoid damage to your vehicle or tires, observe
the following precautions:

Because of restricted traction device clearance
between tires and other suspension compo -
nents, it is important that only traction devices
in good condition are used. Broken devices can
cause serious damage. Stop the vehicle imme -
diately if noise occurs that could indicate
device breakage. Remove the damaged parts
of the device before further use.

Install device as tightly as possible and then
retighten after driving about ½ mile (0.8 km).
Autosock traction devices do not require
retightening.
Do not exceed 30 mph (48 km/h).
Drive cautiously and avoid severe turns and
large bumps, especially with a loaded vehicle.
Do not drive for a prolonged period on dry
pavement.
Observe the traction device manufacturer’s
instructions on the method of installation,
operating speed, and conditions for use.
Always use the suggested operating speed of
the device manufacturer’s if it is less than
30 mph (48 km/h).
Do not use traction devices on a compact
spare tire.
CAUTION!
CAUTION!
Proper operation of four-wheel drive vehicles
depends on tires of equal size, type and
circumference on each wheel. Any difference in
tire size can cause damage to the power transfer
unit. Tire rotation schedule should be followed to
balance tire wear.
8

22_MP_OM_EN_USC_t.book Page 313

324TECHNICAL SPECIFICATIONS
CHASSIS FLUIDS AND LUBRICANTS
Component Fluid, Lubricant, or Genuine Part
6-Speed Automatic Transmission (FWD Models) – If Equipped Use only Mopar® AW-1 Automatic Transmission Fluid, or equivalent.
Failure to use the correct fluid may affect the function or performance of
your transmission.
9-Speed Automatic Transmission (4WD Models) – If Equipped Use only Mopar® ZF 8 & 9 Speed ATF Automatic Transmission Fluid, or
equivalent. Failure to use the correct fluid may affect the function or
performance of your transmission.
Power Transfer Unit (PTU) – If Equipped We recommend using Mopar® Front Axle/PTU Synthetic Axle Lubricant
SAE 75W-90 (API GL-5).
Rear Differential (RDM) – If Equipped We recommend using Mopar® Rear Axle/RDM Synthetic Axle Lubricant
SAE 75W-90 (API GL-5).
Brake Master Cylinder We recommend using Mopar® DOT 3.

22_MP_OM_EN_USC_t.book Page 324