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Technical Service Bulletin
. 39 Gearbox: droning noises/vibrations in tight corners, vehicles with PR number GH4 (quattro
Topic -
with ultra technology)
United States 444 Volkswagen of America, Inc. (6444)
Transaction
[Status | Released for publishing
Release date | Jul 15, 2025
New customer code
Object of complaint Complaint type [Position]
transmission -> operation, shift and power distribution control [noises, vibrations =| |
entire vehicle -> vehicle areas -> vehicle rear [noises, vibrations -> noise | _|
transmission -> transfer case, differential, power distribution |component, automotive fluids [|
entire vehicle -> vehicle areas -> vehicle front [noises, vibrations > noise [| —_|
entire vehicle -> assemblies -> transmission assembly [noises, vibrations -> noise | —_|
transmission -> cooling, oils component, automotive fluids | |
transmission -> transmission housing, parking lock lappearance, surface | |
chassis -> steering, steering assist [noises, vibrations = | |
transmission -> transmission control operation [noises, vibrations ss |
Vehicle data
Q5NF mit Quattro Ultra HA
Sales types

PR numbers

?:0r ?:with GH4

B9/A5 mit Quattro Ultra HA

Sales types

Final drive code
[rs fora PR
[rs forsfa PR
[rs fora PR
[rst jaozofa |
jess jaozifa |
[rst jaozfa [|
[rss jaozsfa |
[rss Jaozfa [oF
PR numbers

B9/A4 mit Quattro Ultra HA

Sales types

Final drive code
jew: faorgfa |
jew: faov7fa |
jew: jaorsfa |
jaw: fora PR
jaw: [aozofa ff
jaws fora PR
jew: aoa |
jew: faozsfa |
jew: faozfa |
law: Jaosfa [|
PR numbers

C8/A6 mit Quattro Ultra HA

Sales types

Final drive code
aoa |
aoa |
aoa |
aoa |
aoa |
aoa fT
asa [|
PR numbers

?:0r ?:with GH4

C8/A7 mit Quattro Ultra HA

Sales types

PR numbers

?:0r ?:with GH4

Documents

video1.mp4

video2.mp4

testplanassignment.pdf

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Technical Service Bulletin Transaction No.: 2075681/4
39 Gearbox: droning noises/vibrations in tight corners, vehicles with PR number GH4 Release date: Jul 15, 2025
(quattro with ultra technology)

Condition

REVISION HISTORY

revision [bate [purpose

o | Revised header (Added Model/MY)

05/22/2025 | Revised Service (Adjusted measure description)

12/03/2024 | Revised Service (Adjusted measure description)

Customer States:

+ There are audible noises from the drive train (gearbox, drive shaft and/or rear final drive) when pulling away

quickly from a standstill with the wheels turned.
and/or
+ Vibrations, humming, droning, or rubbing can be heard and/or felt in the vehicle interior and/or on the rear
seats when the steering wheel is turned to full lock.

Workshop findings:

+ The customer statement can be reproduced.

Technical Background

The friction system of the four-wheel drive clutch may change slightly over a long period of time when the proportion
of all-wheel drive use is very low. The following procedure can be used to resolve the customer complaint.
Production Solution

Not applicable.

Service

Try to reproduce the customer complaint (based on the description/workshop findings/event memory entries), so
that it can be clearly assigned to this TSB. The following repair must only be carried out if all the criteria (model/type,
chassis number, engine/gearbox code, PR number(s), part number, software version, code etc.) apply exactly.
Otherwise, this measure will not eliminate the problem and repeat repairs may be necessary. In such a case, we
may reject the warranty claim and charge back the cost of the parts.

To ensure the noise/complaint can be clearly assigned, please scan the QR Codes below (Figures 1 and 2)
and refer to the videos below.

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Figure 1. https://audiexternal. Figure 2. https://audiexternal.

kzoplatform.com/player/medium/2787316587877635582 kzoplatform.com/player/medium/27873225043964 12567

If the complaint is confirmed, proceed as follows:

Using application programs while driving can distract the driver from the road.

— Ifthe driver is distracted, this can lead to accidents and injuries.

— Observe the road traffic regulations. They have priority over any driving instructions.

—- Always perform the program with a second person who operates the test equipment.

— Make sure that test equipment in the vehicle does not distract the driver.

Danger due to the transportation of unsecured test equipment. If test equipment if transported unsecured

or in the range of airbags, this could cause injuries in certain maneuvers or in the event of an accident.

— Make sure that the test equipment is secured properly.

— Do not transport test equipment in areas in which airbags inflate.

— If possible, use test equipment on the rear seat bench. If there is no rear seat bench, keep test
equipment flat on the passenger’s lap. The passenger must operate the equipment. Move the
passenger Seat as far back as possible.

To perform this work, you will need a suitable area on which it is possible to drive in circles safely. The
requirements are the same as those which apply to the system function test for the all-wheel drive system.
Asecond person must assist in operating the ODIS tester during the road test.

1. Drive the vehicle to a cordoned-off area or to an area where it is safe to drive with the steering wheel at full
lock. When driving in circles, no other traffic should be present or authorized in this area.

2. Once the vehicle has reached operating temperature, it can be parked in this area.

3. Connect the ODIS tester and expand the test plan by entering the reference number 2074883. Add the
suggested test program -0022 — Function test of clutch for frictional vibration — to the test plan. Do NOT
search for the test plan via “Select self test.” Refer to the attached “TestPlanAssignment.pdf” for detailed
instructions.

a. The corresponding program “0022 - Function test of clutch for frictional vibration” is only available if the
test plan has been expanded by entering reference number 2074883 in the TSB tab in the center of the
screen.

b. Open the window for entering the reference number via the TSB tab.

c. Close the window after entering the reference number.

d. After selecting “Expand test plan”, the program “0022 - Function test of clutch for frictional vibration” will
be available in the test plan.

4. Start the test -0022 — Function test of clutch for frictional vibration —. ==> Select -1- Target torque 150 Nm and
perform the test program.

5. Let the engine idle and apply the brakes. At full steering lock, release the brakes and slowly increase the
speed up to max 10 km/h (6 mph). The goal of this test plan is to drive in a circle at a maximum speed of 10
km/h (6 mph) until the symptoms described by the customer no longer occur. This process may take several
minutes. In certain cases, temperature monitoring may cause the test mode to stop prematurely. The yellow
warning lamp and the message “Four-wheel drive overheating” are activated in this case. If the customer
complaint still occurs after the test plan stops automatically, the test procedure must be repeated up to three
times.

6. After successfully completing the test, check for the event memory entry “CO5DCO0 4WD/AWD Clutch
Temperature Too High’ in the all-wheel drive electronics and erase it if necessary. Please provide the complete
diagnostic log online.

If a speed of 11 km/h (~7 mph) is exceeded, the test will be automatically aborted. In this case, the

frictional vibration test will need to be restarted.

Warranty

Claim Type: + Ifthe vehicle is outside of any warranty, this Technical Service Bulletin is

informational only.

Damage Code: 0020

Labor Operations: Measure all-wheel drive clutch unit (four-wheel drive | 39600399 |30TU

overheating)

GFF 0150 0060 | Time stated on the
diagnostic protocol

Road test prior to the service procedure 01210002 |10TU

Road test after the service procedure 01210004 |10TU

Charge battery 2706 8950 |See SRT with
associated
operations

Claim Comment: As per TSB 2075681/4

All warranty claims submitted for payment must be in accordance with the Audi Warranty Policies and Procedures
Manual. Claims are subject to review or audit by Audi Warranty.

Additional Information

All part and service references provided in this TSB (2075681) are subject to change and/or removal. Always check
with your Parts Department and/or ETKA for the latest information and parts bulletins. Please check the Repair
Manual for fasteners, bolts, nuts, and screws that require replacement during the repair.

©2025 Audi of America, Inc. All rights reserved. The information contained in this document is based on the latest
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