39 Gearbox: Droning Noises/Vibrations In Tight Corners, Vehicles With Pr Number GH4 (QUATTRO With Ultra Technology) (GROUP 39, NO. 25-77)
Reference number: GROUP 39, NO. 25-77
Supersedes refnos: (2075681/1), (2075681/3), 2075681/2, GROUP 39, NO. 24-75, GROUP 39, NO. 24-76
39 GEARBOX: DRONING NOISES/VIBRATIONS IN TIGHT CORNERS, VEHICLES WITH PR NUMBER GH4 (QUATTRO WITH ULTRA TECHNOLOGY)
TECHNICAL SERVICE BULLETIN
| AUDI: | 2017-2025 A4, and A4 allroad; 2018-2025 S4, Q5, and SQ5; 2018-2024 A5, A5 Cabriolet, A5 Sportback, S5, S5 Cabriolet, and S5 Sportback; 2018-2019, 2021-2024 RS 5; 2019-2025 A6, and A7; 2019. 2021-2024 RS 5 Sportback; 2020-2025 A6 allroad, S6, S7, and Q5 e quattro; 2021-2025 RS 6 Avant, RS 7, SQ5, and SQ5 Sportback; 2021-2022 A7 e quattro |
| GROUP: | 39 - Differential |
SERVICE INFORMATION
39 25 77 2075681/3 May 22, 2025. Supersedes Technical Service Bulletin Group 39 number 24-76 dated December 3, 2024, for reasons listed below.
| Model(s) | Year | VIN Range | Vehicle-Specific Equipment |
|---|---|---|---|
| A4, and A4 allroad | 2017 - 2025 | All | With quattro Ultra |
| S4, Q5, and SQ5 | 2018 - 2025 | ||
| A5, A5 Cabriolet, A5 Sportback, S5, S5 Cabriolet, and S5 Sportback | 2018 - 2024 | ||
| RS 5 | 2018 - 2019 2021 - 2024 |
||
| A6, and A7 | 2019 - 2025 | ||
| RS 5 Sportback | 2019 2021 - 2024 |
||
| A6 allroad, S6, S7, and Q5 e quattro | 2020 - 2025 | ||
| RS 6 Avant, RS 7, SQ5, and SQ5 Sportback | 2021 - 2025 | ||
| A7 e quattro | 2021 - 2022 |
CONDITION
| Revision | Date | Purpose |
|---|---|---|
| 3 | - | Revised Service (Adjusted measure description) |
| 2 | 12/03/2024 | Revised Service (Adjusted measure description) |
| 1 | 10/21/2024 | Initial Publication |
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 1
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 in the bulletin and refer to the videos below.
If the complaint is confirmed, proceed as follows:
- If the 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.
- 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. A second person must assist in operating the ODIS tester during the road test.
- 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.
- Once the vehicle has reached operating temperature, it can be parked in this area.
- 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.
- 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.
- Open the window for entering the reference number via the TSB tab.
- Close the window after entering the reference number.
- After selecting "Expand test plan", the program "0022 - Function test of clutch for frictional vibration" will be available in the test plan.
- Start the test -0022- Function test of clutch for frictional vibration -. ==> Select -1- Target torque 150 Nm and perform the test program.
- 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.
- After successfully completing the test, check for the event memory entry "C05DC00 4WD/AWD Clutch Temperature Too High" in the all-wheel drive electronics and erase it if necessary. Please provide the complete diagnostic log online.
WARRANTY
| Claim Type: |
|
||
| Service Number: | 3960 | ||
| Damage Code: | 0020 | ||
| Labor Operations: | Measure all-wheel drive clutch unit (fourwheel drive overheating) | 3960 0399 | 30 TU |
| GFF | 0150 0060 | Time stated on the diagnostic protocol | |
| Road test prior to the service procedure | 0121 0002 | 10 TU | |
| Road test after the service procedure | 0121 0004 | 10 TU | |
| Charge battery | 2706 8950 | See SRT with associated operations | |
| Claim Comment: | As per TSB 2075681/3 | ||
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.
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