NHTSA ID Number: 11009768
Manufacturer Communication Number: 24-DS-001G-1 TSB
TSB/Document Date: 2024-11-05
Summary
Certain GV70 (JK1, 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.
DRIVESHAFT AND
AXLE
24-DS-001G-1
OCTOBER 2024
GV70 (JK1, JK1A)
GV80 (JX1)
G80 (RG3)
REAR DIFFERENTIAL HUM OR WHINE NOISE
INSPECTION AND REPAIR
This TSB supersedes 24-DS-001G to clarify the applicable model years.
Description: Certain GV70 (JK1, 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:
• All GV70 (JK1) with VINs starting with "KMU"
• All GV70 (JK1A) with VINs starting with "5NM"
• All GV80 (JX1)
• All 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:
GV70 (JK1, JK1A)
GV80 (JX1)
G80 (RG3)
28751-3J000
GV70 (JK1, JK1A)
GV80 (JX1)
28751-2S000
G80 (RG3)
28751-3S100
GV70 (JK1, JK1A)
GV80 (JX1)
49319-T6100
G80 (RG3
49319-3M000
GV70 (JK1, JK1A)
GV80 (JX1)
G80 (RG3)
49329-3M000
GV70 (JK1, JK1A)
GV80 (JX1)
49319-T6000
G80 (RG3)
49319-T1000
Front & Center
Muffler Gasket
2.5T: 1
Rear & Center
Muffler Gasket
2
3.5T: 2
2
Rear Propeller Shaft
Bolts 2.5T and 3.5T
(to transfer case)
3
Rear Propeller Shaft Nuts
(to transfer case)
3
Rear Propeller Shaft Bolts
(to differential)
3
TSB #: 24-DS-001G-1
Page 2 of 20
SUBJECT:
i
Information
Order the following parts only if differential replacement is necessary.
GV70 (JK1, JK1A)
53000-47520
2.5T, AWD
53000-4J510
3.5T, AWD
53000-4J520
3.5T, AWD,
w/ & w/out E-LSD
53000-4J600
GV80 (JX1)
G80 (RG3)
53000-4J610
1
2.5T, RWD & AWD
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
GV70 (JK1, JK1A)
GV80 (JX1)
G80 (RG3)
28751-3J000
GV70 (JK1, JK1A)
GV80 (JX1)
28751-2S000
G80 (RG3)
28751-3S100
GV70 (JK1, JK1A)
GV80 (JX1)
49319-T6100
G80 (RG3)
49319-3M000
GV70 (JK1, JK1A)
GV80 (JX1)
G80 (RG3)
49329-3M000
GV70 (JK1, JK1A)
GV80 (JX1)
49319-T6000
G80 (RG3)
49319-T1000
1
Front & Center
Muffler Gasket
2.5T: 1
3.5T: 2
Rear & Center
Muffler Gasket
2
Rear Propeller Shaft Bolts
(to transfer case)
2
2.5T and 3.5T
3
Rear Propeller Shaft Nuts
(to transfer case)
3
Rear Propeller Shaft Bolts
(to differential)
3
TSB #: 24-DS-001G-1
Page 3 of 20
SUBJECT:
GV70 (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
2.5T and 3.5T
w/out E-LSD
GV80 (JX1)
G80 (RG3)
49557-T6000
2.5T and 3.5T
w/ E-LSD
49557-3M000
2.5T
49557-2G000
3.5T
GV70 (JK1, JK1A)
GV80 (JX1)
G80 (RG3)
49551-4T000
Axle Castle Lock Nut
GV70 (JK1, JK1A)
GV80 (JX1)
00232-19075
Gear Oil, 75W-85, GL-5,
LSD*, 1.0 qt
00232-19097
Gear Oil, 75W-85, GL-5,
Non LSD, 1.0 qt
G80 (RG3)
2
2
2.5T and 3.5T
2
*NOTE: LSD gear oil designates the specification, NOT if the vehicle is equipped with an E-LSD.
TSB #: 24-DS-001G-1
Page 4 of 20
SUBJECT:
Warranty Information:
53000F08
Rear Differential Carrier Noise
Inspection
0.4 M/H
GV70 (JK1, JK1A)
GV80 (JX1)
Rear Differential Carrier Noise
G80 (RG3)
53000F09 Inspection, Lock Nut Tightening, 1.9 M/H
and Noise Reinspection
Rear Differential Carrier Noise
GV70 (JK1, JK1A)
Inspection, Lock Nut Tightening
GV80 (JX1)
53000F10
(when overtightened),
4.7 M/H
G80 (RG3)
Replacement (without E-LSD),
and Alignment
Rear Differential Carrier Noise
Inspection, Lock Nut Tightening
GV70 (JK1, JK1A)
53000F11
(when overtightened),
4.8 M/H 53000*
GV80 (JX1)
Replacement (with E-LSD) and
Alignment
Q26
ZZ1
Rear Differential Carrier Noise
GV70 (JK1, JK1A)
Inspection, Lock Nut Tightening,
GV80 (JX1)
53000F12
Noise Reinspection,
6.1 M/H
G80 (RG3)
Replacement (without E-LSD),
and Alignment
Rear Differential Carrier Noise
Inspection, Lock Nut Tightening,
GV70 (JK1, JK1A)
53000F13
Noise Reinspection,
6.2 M/H
GV80 (JX1)
Replacement (with E-LSD), and
Alignment
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-1
Page 5 of 20
SUBJECT:
Service Procedure:
STUI
This TSB includes Repair validation photos. Refer to the latest Warranty Digital Documentation
Policy for requirements.
Rear Differential Noise Conditions
GV70 (JK1, JK1A): Hum or whine noise at approximately
37 to 70 mph (approx. 60 to 110 km/h)
GV80 (JX1) and G80 (RG3): Hum or whine noise at
approximately 25 to 50 mph (approx. 40 to 80 km/h)
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-1
Page 6 of 20
SUBJECT:
1.
Drive the vehicle on the road to inspect the vehicle for a rear differential noise.
•
GV70 (JK1, JK1A): Hum or whine noise in the speed range of 37 to 70 mph
(approx. 60 to 110 km/h)
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.
•
GV 80 (JX1) and G80 (RG3): Hum or whine noise in the speed range of 25 to 50 mph
(approx. 80 to 40 km/h)
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, then the service procedure is now complete.
If noises are heard from other areas of the vehicle, then continue to diagnose, and repair the
vehicle as necessary.
TSB #: 24-DS-001G-1
Page 7 of 20
SUBJECT:
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-1
Page 8 of 20
SUBJECT:
2.
If the vehicle is equipped with an E-LSD, use
the GDS Brake Pad Change Mode to release
the parking brake.
To access the Brake Pad Change Mode,
refer the shop manual:
•
GV70 (JK1, JK1A):
Brake System > Brake System > Parking
Brake System > Electronic Parking
Brake (EPB) > Adjustment
•
GV80 (JX1) and G80 (RG3):
Brake System > Brake System > Rear
Disc Brake > Repair procedures
•
After releasing the parking brake,
disconnect the 12 V battery negative (–)
terminal and the EPB actuator connector
after completing the function.
If the vehicle is NOT equipped with an E-LSD,
skip to step 3.
i
Information
For E-LSD equipped vehicles, shifting
into the transmission into neutral and
releasing the EPB is necessary to turn
the propeller shaft to access the bolts.
3.
Refer to the applicable shop manual to remove
the rear propeller shaft to access the rear
differential lock nut.
• Driveshaft and Axle > Propeller Shaft
Assembly > Propeller Shaft
TSB #: 24-DS-001G-1
Page 9 of 20
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TSB/Document ID: 24-DS-001G-1 TSB
Replacement Service Bulletin Number:
MFR Communication Date: 2024-10-31
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: POWER TRAIN
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