2022 Jeep Grand Cherokee Four-Wheel Drive Operation Manual

2022 Jeep Grand Cherokee Four-Wheel Drive Operation Manual

FOUR-WHEEL DRIVE OPERATION

The driveline is equipped with a Front Axle Disconnect (FAD) for the one-speed and two-speed drivelines. The FAD operation is fully automated and controlled by the Drivetrain Control Module (DTCM). It does not require any customer input to engage. The FAD is set to connect, disconnect and provide 4WD function based on certain set conditions detected by the DTCM, including but not limited to the following:

• Ambient temperature
• Wipers
• Selec-Terrain Mode selection
• Wheel-slip detection

The FAD is actuated only in the 4WD HI range and stays connected for 4WD LOW.

QUADRA-TRAC I OPERATING

INSTRUCTIONS/PRECAUTIONS —IF EQUIPPED

The Quadra-Trac I is a single-speed (HI range only) transfer case, which enables on-demand four-wheel drive with active torque management. No driver interaction is required. The Brake Traction Control (BTC) system, which combines standard ABS and Traction Control, provides resistance to any wheel that is slipping to allow additional torque transfer to wheels with traction.

NOTE: The Quadra-Trac I system is not appropriate for conditions where the 4WD LOW range is recommended on page 200.

QUADRA-TRAC II OPERATING

INSTRUCTIONS/PRECAUTIONS — IF EQUIPPED

The Quadra-Trac II system comes equipped with a customer-selectable electronically operated on-demand transfer case with active torque management in all driveable ranges. This transfer case provides the following operating range positions

• 4WD HI
• N (NEUTRAL)
• 4WD LOW

When additional tractive effort and torque are required, the 4WD LOW position can be used. The 4WD LOW position is intended for loose, slippery road surfaces only. Driving in the 4WD LOW position on dry, hard-surfaced roads may cause increased tire wear and damage to driveline components. When operating your vehicle in 4WD LOW, the engine speed is approximately three times that of the normal 4WD HI position at a given road speed. Take care not to Overspeed the engine and do not exceed 25 mph (40 km/h). Proper operation of four-wheel-drive vehicles depends on tires of equal size, type, and circumference on each wheel. Any difference will adversely affect the performance and function of the transfer case. Because four-wheel drive provides improved traction, there is a tendency to exceed safe turning and stopping speeds. Do not go faster than road conditions permit.

WARNING

You or others could be injured or killed if you leave the vehicle unattended with the transfer case in the N (NEUTRAL) position without first fully engaging the parking brake. The transfer case N (NEUTRAL) position disengages both the front and rear driveshafts from the powertrain and will allow the vehicle to roll, even if the transmission is in PARK. The parking brake should always be applied when the driver is not in the vehicle.

SHIFT POSITIONS

For additional information on the appropriate use of each four-wheel-drive system mode position, see the information below

4WD HI

This is the default operating range for daily use.

N (NEUTRAL)

This range disengages the driveline from the powertrain. It is used for towing your vehicle behind another vehicle page 196.

WARNING

You or others could be injured or killed if you leave the vehicle unattended with the transfer case in the N (NEUTRAL) position without first fully engaging the parking brake. The transfer case N (NEUTRAL) position disengages both the front and rear driveshafts from the powertrain and will allow the vehicle to roll, even if the transmission is in PARK. The parking brake should always be applied when the driver is not in the vehicle.

4WD LOW

This range is for low-speed four-wheel drive. It provides an additional gear reduction which allows for increased torque to be delivered to both the front and rear wheels while providing maximum pulling power for loose, slippery road surfaces only. Do not exceed 25 mph (40 km/h).

SHIFTING PROCEDURES

4WD HI To 4WD LOW

With the vehicle at speeds of 0 to 3 mph (0 to 5 km/h), the ignition switch in the ON/RUN position and the engine running, shift the transmission into NEUTRAL (N), push and hold the 4WD LOW button until the 4WD LOW indicator light begins to flash in the instrument cluster. When the shift is complete, the 4WD LOW indicator light will remain solid.

NOTE

If shift conditions/interlocks are not met, a “To Complete 4WD Shift Put Transmission In Neutral” or a “To Complete 4WD Shift Speed Must Be Below 3 MPH” or a “To Complete 4WD Shift Allow Engine To Return To Idle” message will flash from the instrument cluster display page 99.

4WD LOW To 4WD HI

With the vehicle at speeds of 0 to 3 mph (0 to 5 km/h), the ignition switch in the ON position or the engine running, shift the transmission into NEUTRAL (N), push and hold the 4WD LOW button until the 4WD LOW indicator light begins to flash in the instrument cluster. When the shift is complete, the 4WD LOW indicator light will remain off.

NOTE

• If shift conditions/interlocks are not met — the “4WD Shift Cancelled” or “4WD Shift Aborted/ Retry Shift” message will be displayed on the instrument cluster. To reattempt shift, put the transmission in NEUTRAL (N) and push and hold the 4WD LOW button.
• If shift conditions/interlocks are not met, a “To Complete 4WD Shift Put Transmission In Neutral” or a “To Complete 4WD Shift Speed Must Be Below 3 MPH” or a “To Complete 4WD Shift Allow Engine To Return To Idle” message will flash from the instrument cluster display
  page 99.
• Shifting into or out of 4WD LOW is possible with the vehicle completely stopped; however, difficulty may occur due to the mating clutch teeth not being properly aligned. Several attempts may be required for clutch teeth alignment and shift completion to occur. The preferred method is with the vehicle rolling 0 to 3 mph (0 to 5 km/h). If the vehicle is moving faster than 3 mph (5 km/h), the transfer case will not allow the shift.

QUADRA-TRAC II SYSTEM — IF EQUIPPED

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. Follow the Quadra-Trac II transfer case shifting information, preceding this section, for shifting this system.

ELECTRONIC SWAY BAR DISCONNECT — IF EQUIPPED

Your vehicle may be equipped with an electronic disconnecting stabilizer/sway bar. This system allows greater front suspension travel in off-road situations. This system is controlled by the SWAY BAR switch located on the instrument panel (to the right of the gear selector).

Push the SWAY BAR switch to activate the system. Push the switch again to deactivate the system. The Sway Bar Indicator Light (located in the instrument cluster) will illuminate when the bar is disconnected. The Sway Bar Indicator Light will flash during activation transition, or when activation conditions are not met. The stabilizer/sway bar should remain in on-road mode during normal driving conditions.

WARNING

Ensure the stabilizer/sway bar is reconnected before driving on hard-surfaced roads or at speeds above 18 mph (29 km/h); a disconnected stabilizer/sway bar may contribute to the loss of vehicle control, which could result in serious injury. Under certain circumstances, the front stabilizer/sway bar enhances vehicle stability and assists with vehicle control. The system monitors vehicle speed and will attempt to reconnect the stabilizer/sway bar at speeds over 18 mph (29 km/h). This is indicated by a flashing or solid Sway Bar Indicator Light. Once a vehicle speed is reduced below 14 mph (22 km/h), the system will once again attempt to return to off-road mode. To disconnect the stabilizer/sway bar, shift to 4WD LOW and push the SWAY BAR switch to obtain the off-road position page 134. The Sway Bar Indicator Light will flash until the stabilizer/sway bar has been fully disconnected.

NOTE: The stabilizer/sway bar may be torque locked due to left and right suspension height differences. This condition is due to driving surface differences or vehicle loading. In order for the stabilizer/sway bar to disconnect/reconnect, the right and left halves of the bar must be aligned. This alignment may require that the vehicle be driven onto the level ground or rocked from side to side. To return to on-road mode, push the SWAY BAR switch again.

WARNING

If the stabilizer/sway bar will not return to on-road mode, the Sway Bar Indicator Light will flash in the instrument cluster and vehicle stability may be reduced. Do not attempt to drive the vehicle over 18 mph (29 km/h). Driving faster than 18 mph (29 km/h) with a disconnected stabilizer/sway bar may contribute to the loss of vehicle control, which could result in serious injury.