DRIVESHAFT AND
AXLE

24-DS-001G

MAY 2024

GV70 (JK1 & JK1A)
GV80 (JX1)
G80 (RG3)

REAR DIFFERENTIAL HUM OR WHINE NOISE
INSPECTION AND REPAIR
This TSB supersedes 23-DS-004G-1 to revise the repair flow chart, add additional information
to the noise inspection, add an additional STUI photo requirement before the lock nut tightening,
a reminder to fill a new differential with gear oil, and to add warranty chargeback information.
Description: Certain GV70 (JK1 and JK1A), GV80 (JX1) and G80 (RG3) vehicles may have a hum or
whine noise condition from the rear differential at certain speeds. This bulletin describes the procedure
to inspect the vehicle for the hum or whine noise and if necessary to tighten the rear differential lock
nut first. If the hum or whine noise remains, then replace the rear differential or other driveline
components as necessary.

Applicable Vehicles:
• 2022MY~ 2023MY GV70 (JK1, VIN starts with "KMU")
• 2024MY~ GV70 (JK1A, VIN starts with "5NM")
• 2021MY~ GV80 (JX1)
• 2021MY~ G80 (RG3)

Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair

Table of Contents
Parts Information: .............................................................................................. 2
Warranty Information: ........................................................................................ 5
Service Procedure: ............................................................................................. 6
Repair Flow Chart ........................................................................................... 6
Rear Differential Noise Inspection ................................................................ 7
Rear Differential Lock Nut Tightening........................................................... 8
Rear Differential Replacement ..................................................................... 17
Parts Information:

JK1
JK1A
JX1
RG3

28751-3J000

JK1
JK1A
JX1

28751-2S000

RG3

28751-3S100

JK1
JK1A
JX1

49319-T6100

RG3

49319-3M000

JK1
JK1A
JX1
RG3

49329-3M000

JK1
JK1A
JX1

49319-T6000

RG3

49319-T1000

2.5T: 1 each

Front & Center
Muffler Gasket

3.5T: 2 each
2 each

Rear & Center
Muffler Gasket

2 each
Rear Propeller Shaft Bolts
(to transfer case)

2.5T and 3.5T

3 each

Rear Propeller Shaft Nuts
(to transfer case)

3 each

Rear Propeller Shaft Bolts
(to differential)

3 each

TSB #: 24-DS-001G

Page 2 of 20
SUBJECT:

Order the following parts only if differential replacement is necessary.
JK1
JK1A

JX1

RG3

53000-47520

2.5T, AWD

53000-4J510

3.5T, AWD

53000-4J520

3.5T, AWD,
w/ & w/out E-LSD

53000-4J600

2.5T, RWD & AWD

53000-4J610

Rear Differential Carrier

3.5T, AWD

53000-4J630

3.5T, AWD, E-LSD

53000-47501

2.5T, RWD

53000-47502

2.5T, RWD

53000-4J500

3.5T, RWD & AWD

JK1
JK1A
JX1
RG3

28751-3J000

JK1
JK1A
JX1

28751-2S000

RG3

28751-3S100

JK1
JK1A
JX1

49319-T6100

RG3

49319-3M000

JK1
JK1A
JX1
RG3

49329-3M000

JK1
JK1A
JX1

49319-T6000

RG3

49319-T1000

1 each

1 each

Front & Center
Muffler Gasket

2.5T: 1 each
3.5T: 2 each

Rear & Center
Muffler Gasket

2 each
2 each

Rear Propeller Shaft Bolts
(to transfer case)

2.5T and 3.5T

3 each

Rear Propeller Shaft Nuts
(to transfer case)

3 each

Rear Propeller Shaft Bolts
(to differential)

3 each

TSB #: 24-DS-001G

Page 3 of 20
SUBJECT:

JK1
JK1A

49557-3M000

2.5T, w/out E-LSD

49557-2G000

3.5T, w/out E-LSD

49557-T6000

3.5T w/ E-LSD

49557-2G000
JX1

RG3

Axle Clip

2.5T and 3.5T
w/out E-LSD

49557-T6000

2.5T and 3.5T
w/ E-LSD

49557-3M000

2.5T

49557-2G000

3.5T

JK1
JK1A
JX1
RG3

49551-4T000

Axle Castle Lock Nut

JK1
JK1A
JX1

00232-19075

Gear Oil, 75W-85, GL-5,
LSD*, 1.0qt

RG3

00232-19097

2 each

2 each

2.5T and 3.5T
2 each

Gear Oil, 75W-85, GL-5,
Non LSD, 1.0qt

*NOTE: LSD gear oil designates the specification, not if the vehicle is equipped with an E-LSD.

TSB #: 24-DS-001G

Page 4 of 20
SUBJECT:

Warranty Information:

Rear Differential Carrier Noise
Inspection

0.4 M/H

GV70 (JK1
and JK1A)
GV80 (JX1)
G80 (RG3)

53000F08

GV70 (JK1
and JK1A)
GV80 (JX1)
G80 (RG3)

Rear Differential Carrier Noise
Inspection, Lock Nut Tightening
53000F10
4.7 M/H
(When Overtightened), Replacement
(Without E-LSD), and Alignment

GV70 (JK1
and JK1A)
GV80 (JX1)

Rear Differential Carrier Noise
53000*
Inspection, Lock Nut Tightening
53000F11
4.8 M/H
(When Overtightened), Replacement
(With E-LSD) and Alignment

GV70 (JK1
and JK1A)
GV80 (JX1)
G80 (RG3)
GV70 (JK1
and JK1A)
GV80 (JX1)

Rear Differential Carrier Noise
53000F09 Inspection, Lock Nut Tightening, and 1.9 M/H

Noise Reinspection

53000F12

Rear Differential Carrier Noise
Inspection, Lock Nut Tightening,
Noise Reinspection, Replacement
(Without E-LSD), and Alignment

6.1 M/H

53000F13

Rear Differential Carrier Noise
Inspection, Lock Nut Tightening,
Noise Reinspection, Replacement
(With E-LSD), and Alignment

6.2 M/H

Q26

ZZ1

NOTE 1: Normal warranty applies.
NOTE 2: Submit claim on Claim Entry Screen as “Warranty” type.
NOTE 3: This TSB includes Repair validation photos. Op times include VIN, Mileage, and Repair
validation photos as outlined in the Digital Documentation Policy
NOTE 4: The incident parts are subject to callback through the normal Warranty Technical Center
(WTC) parts return process. Claim is subject to debit if the part is not returned.
NOTE 5: * Refer to applicable parts catalog for full causal part numbers.

TSB #: 24-DS-001G

Page 5 of 20
SUBJECT:

Service Procedure:

STUI
This TSB includes Repair validation photos. Refer to the latest Digital Documentation Policy for
requirements.
Repair Flow Chart
Rear Differential Noise Conditions
JK1 and JK1A: Hum or whine noise at approximately 37 to 70
mph (approx. 60 to 110 kph)
JX1 and RG3: Hum or whine noise at approximately 25 to 50
mph (approx. 40 to 80 kph)

NOTICE
•
•
•

Replacing the rear differential before attempting the lock nut tightening procedure may result in a
warranty charge back.
Diagnose and repair other components if the noise does not fall within the specified differential noise
conditions.
Do not tighten the lock nut on a new differential.

TSB #: 24-DS-001G

Page 6 of 20
SUBJECT:

Rear Differential Noise Inspection
1.

Drive the vehicle on the road to inspect the vehicle for rear differential noise.
•

JK1 and JK1A: Hum or whine noise in the speed range of 37 to 70 mph (approx. 60 to 110
kph)
o To confirm the noise is from the rear differential, drive at approximately 52 mph and
gently depress the accelerator pedal then release the pedal to coast. Repeat this a
few times. The humming/whining noise will be most apparent when depressing and
releasing the pedal.

•

JX1 and RG3: Hum or whine noise in the speed range of 25 to 50 mph (approx. 80 to 40 kph)
o To confirm the noise is from the rear differential, drive at approximately 35 mph and
gently depress the accelerator pedal then release the pedal to coast. Repeat this a
few times. The humming/whining noise will be most apparent when depressing and
releasing the pedal.

i
•
•
•
•

•
•
•

Information
The noise does not have to occur during the entire speed range.
Do not test the vehicle for noise on the lift. The vehicle must be driven on the road to
accurately assess for differential noise.
For an optimal evaluation, ensure a person sits in the rear seat during the test drive to
identify the noise source.
If the noise is NOT from the rear of the vehicle, then the rear differential may not be the
source. Determine where noise is coming from and proceed with diagnosis and repair for
that noise.

If noise is heard as described above, continue to the Rear Differential Lock Nut Tightening
procedure below.
If the noise as described above is not heard, the service procedure is now complete.
If noises are heard from other areas of the vehicle, continue to diagnose, and repair the
vehicle as necessary.

TSB #: 24-DS-001G

Page 7 of 20
SUBJECT:

Rear Differential Lock Nut Tightening
1.

Using a lift, slightly raise the vehicle until the tires
are no longer touching the ground.
Within 3 minutes of turning off the vehicle’s
engine, place the transmission into neutral by
pressing the button (B) under the cap cover (A)
on the center console.
a) Remove the cap-cover.
b) Press the button while depressing the
brake pedal until the transmission shifts
into neutral. The button must be pressed
within 3 minutes after the engine is turned
off.

i

A

B

Information

If neutral is selected while the engine is
running, the transmission will not remain in
neutral when the vehicle is turned off.

TSB #: 24-DS-001G

Page 8 of 20
SUBJECT:

2.

If the vehicle is equipped with an E-LSD, use the
GDS “Brake Pad Change Mode” function to
release the parking brake.
The Brake Pad Change Mode procedures can be
found in the shop manual.
•

•
•

JK1 and JK1A: Brake System → Brake
System → Parking Brake System →
Electronic Parking Brake (EPB) →
Adjustment
JX1 and RG3: Brake System → Brake
System → Rear Disc Brake → Repair
Procedures
After releasing the parking brake, disconnect
the 12v battery negative (-) terminal and the
EPB actuator connector after completing the