2021 JEEP GRAND CHEROKEE differential

For vehicles not equipped with an instrument
cluster display, perform the following steps:
1. Center the steering wheel (front wheels
pointing straight forward).
2. Shift the transmission into PARK.
3. Apply the parking brake.
4. Start the engine.
5. Rotate the steering wheel slightly more
than one-half turn to the left.
6. Push the “ESC Off” button located in the
lower switch bank below the climate con-
trol four times within 20 seconds. The
“ESC Off Indicator Light” should turn on
and turn off two times.
7. Rotate the steering wheel back to center
and then an additional slightly more than
one-half turn to the right.
8. Turn the ignition to the OFF mode and
then back to ON. If the sequence was
completed properly, the “ESC Off Indica-
tor Light” will blink several times to con-
firm HSA is disabled.
9. Repeat these steps if you want to return
this feature to its previous setting.Towing With HSA
HSA will also provide assistance to mitigate
roll back while towing a trailer.
WARNING!
• If you use a trailer brake controller with
your trailer, the trailer brakes may be
activated and deactivated with the brake
switch. If so, there may not be enough
brake pressure to hold both the vehicle
and the trailer on a hill when the brake
pedal is released. In order to avoid roll-
ing down an incline while resuming ac-
celeration, manually activate the trailer
brake or apply more vehicle brake pres-
sure prior to releasing the brake pedal.
• HSA is not a parking brake. Always apply
the parking brake fully when exiting your
vehicle. Also, be certain to place the
transmission in PARK.
• Failure to follow these warnings can re-
sult in a collision or serious personal
injury.
Traction Control System (TCS)
This system monitors the amount of wheel
spin of each of the driven wheels. If wheel
spin is detected, the TCS may apply brake
pressure to the spinning wheel(s) and/or re-
duce engine power to provide enhanced ac-
celeration and stability. A feature of the TCS,
Brake Limited Differential (BLD), functions
similar to a limited slip differential and con-
trols the wheel spin across a driven axle. If
one wheel on a driven axle is spinning faster
than the other, the system will apply the
brake of the spinning wheel. This will allow
more engine power to be applied to the wheel
that is not spinning. BLD may remain en-
abled even if TCS and ESC are in a reduced
mode.
Electronic Stability Control (ESC)
This system enhances directional control and
stability of the vehicle under various driving
conditions. ESC corrects for oversteering or
understeering of the vehicle by applying the
brake of the appropriate wheel(s) to assist in
counteracting the oversteer or understeer
condition. Engine power may also be reduced
to help the vehicle maintain the desired path.
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Cavity Cartridge Fuse Micro Fuse Description
F22 20 Amp Blue – Engine Control Module
(*)
F23 30 Amp Pink – Interior Lights #1
F24 30 Amp Pink – Driver Door Module
F25 30 Amp Pink – Front Wipers
F26 30 Amp Pink – Anti-lock Brakes/Stability Control Module, ECU and Valves
(*)
F28 20 Amp Blue – Trailer Tow Backup Lights — If Equipped
(*)
F29 20 Amp Blue – Trailer Tow Parking Lights — If Equipped
(*)
F30 30 Amp Pink – Trailer Tow (Receptacle) / Trailer Tow (Separate E-Brake) / Trailer Tow
(BUX) — If Equipped
(*)
F32 30 Amp Pink – Drive Train Control Module
(*)
F34 30 Amp Pink – Slip Differential Control — If Equipped
(*)
F35 30 Amp Pink – Sunroof - If Equipped
F36 30 Amp Pink – Rear Defroster
F37 25 Amp Clear – Rear Blower Motor — If Equipped
F38 30 Amp Pink – Power Inverter 230V AC — If Equipped
(*)
F39 30 Amp Pink – Power Liftgate — If Equipped
F40 – 10 Amp Red Daytime Running Lights/Headlamp Leveling
IN CASE OF EMERGENCY
212

Cavity Cartridge Fuse Micro Fuse Description
F42 – 20 Amp Yellow Horn
F44 – 10 Amp Red Diagnostic Port
(*)
F45 – 5 Amp Tan Cyber Security Gateway
(*)
F49 – 10 Amp Red Integrated Central Stack/Climate Control
F50 – 20 Amp Yellow Air Suspension Control Module/Slip Differential - If Equipped
(*)
F51 – 15 Amp Blue KIN/RF HUB/Steering Column Lock — If Equipped
(*)
F53 – 20 Amp Yellow Trailer Tow – Left Turn/Stop Lights — If Equipped
(*)
F56 – 15 Amp Blue Additional Content (Diesel Engine Only)
F57 – 20 Amp Yellow NOX Sensor — If Equipped
(*)
F58 – 15 Amp Blue HID Headlamps LH — If Equipped
(*)
F59 – 10 Amp Red Purging Pump (Diesel Engine Only)
(*)
F60 – 15 Amp Blue Transmission Control Module
(*)
F61 – 10 Amp Red Transmission Control Module/PM Sensor (Diesel Engine Only)
(*)
F62 – 10 Amp Red Air Conditioning Clutch
213

DIMENSIONS
Contour Dimension / inches (mm)
Length WidthHeight
Wheelbase
Air Suspensions Steel Suspensions
3.0L V6 Turbo Diesel, 3.6L V6 Gaso-
line, 5.7L V8 Gasoline189.8 (4821) 76.5 (1943) 70.9 (1802) 70.6 (1792) 114.8 (2915)
6.4L V8 SRT, 6.2L V8 Supercharged 190.8 (4846) 76.9 (1954) 68.9 (1749) 114.8 (2915)
Minimum Ground Clearance / Typical Angles
Minimum Ground Clearance – inches (mm)
(A)
Approach Angle (B) Departure Angle (C) Breakover Angle (D)
Air Suspensions Steel Suspensions
3.0L V6 Turbo Diesel, 3.6L V6 Gaso-
line, 5.7L V8 Gasoline8.1 (205) Front /
9.4 (238) Rear8.6 (218) Front /
10.0 (255) Rear26.2° - 30.5° 24.0° - 27.8° 19.0° - 23.5°
6.4L V8 SRT, 6.2L V8 Supercharged 8.3 (210) 18.0° 22.0° 17.0°
Minimum Ground Clearance (Reference A)
The clearance value is measured next to the
lower edge of the differential. This value also
defines those for the “Approach Angle” the
“Departure Angle” and the “Breakover
Angle”.
Dimensions are expressed in inches (mm)
and refer to the vehicle equipped with its
original tires.Approach Angle (Reference B)
The approach angle is determined by the
horizontal line of the road surface, and by the
tangent line passing between the front wheel,
and the most projecting low point of the car.
The wider the angle, the lower the chance to
hit an obstacle with the body or chassis, when
climbing a steep slope or overcoming an
obstacle.Departure Angle (Reference C)
The departure angle is determined by the
same lines of the “Approach Angle”, and
refers to the rear part of the vehicle.
Breakover Angle (Reference D)
The value of the “Breakover Angle” is linked
to the ground clearance of the vehicle and
indicates the attitude of the vehicle to over-
come a wedge, more or less steep, preventing
279

Chassis
Component Fluid, Lubricant, or Genuine Part
Automatic Transmission We recommended you use TUTELA TRANSMISSION AS8 Fluid, or equivalent, meeting require-
ments of FCA Material Standard 9.55550-AV5 or MS.90030-A5. Failure to use the correct fluid
may affect the function or performance of your transmission.
Transfer Case – Single-Speed (Quadra-Trac I) We recommended you use TUTELA TRANSMISSION POWERGEAR 4 Fluid, or equivalent, meet-
ing requirements of FCA Material Standard MS-10216.
Transfer Case – Two-Speed (Quadra-Trac II) We recommended you use TUTELA TRANSMISSION FORCE 4 Fluid, or equivalent, meeting re-
quirements of FCA Material Standard 9.55550-AV4 or MS-9602 (ATF+4).
Axle Differential (Front) We recommend you use TUTELA TRANSMISSION MULTIAXLE or equivalent, SAE 75W-85 (API-
GL5).
Axle Differential (Rear) – With Electronic
Limited-Slip Differential (ELSD)We recommend you use TRANSMISSION AXLE-DRIVE with friction modifier, or equivalent, SAE
75W-85 (API-GL5).
Axle Differential (Rear) – Without Electronic
Limited-Slip Differential (ELSD)We recommend you use TUTELA TRANSMISSION MULTIAXLE or equivalent, SAE 75W-85 (API-
GL5).
Brake Master Cylinder We recommend you use DOT 3, SAE J1703 brake fluid. If DOT 3 brake fluid is not available
then TUTELA TOP4/S, FMVSS no. 116 DOT 4, ISO 4925 SAE J1704, or equivalent, is accept-
able.
DOT 4 Brake fluid must be replaced every 24 months regardless of mileage.
TECHNICAL SPECIFICATIONS
294

Chassis
Component Fluid, Lubricant, or Genuine Part
Automatic Transmission We recommended you use TUTELA TRANSMISSION AS8 Fluid, or equivalent, meeting require-
ments of FCA Material Standard 9.55550-AV5 or MS.90030-A5. Failure to use the correct fluid
may affect the function or performance of your transmission.
Transfer Case – Single-Speed (Selec-Track) We recommended you use TUTELA TRANSMISSION FORCE 4 Fluid, or equivalent, meeting
requirements of FCA Material Standard 9.55550-AV4 or MS-9602 (ATF+4).
Axle Differential (Front) We recommend you use TUTELA TRANSMISSION MULTIAXLE or equivalent, SAE 75W-85
(API-GL5).
Axle Differential (Rear) – With Electronic
Limited-Slip Differential (ELSD)We recommend you use TRANSMISSION AXLE-DRIVE with friction modifier, or equivalent, SAE
75W-85 (API-GL5).
Brake Master Cylinder We recommend you use DOT 3, SAE J1703 brake fluid. If DOT 3 brake fluid is not available then
TUTELA TOP4/S, FMVSS no. 116 DOT 4, ISO 4925 SAE J1704, or equivalent, is acceptable
If using DOT 4 brake fluid, the fluid must be changed every 24 months. This interval is time based
only, mileage intervals do not apply.
297