nighthawk5263

Hello,

Yesterday Integrated Engineering released a transmission tune for the B9 and I purchased and flashed it to my car. After test driving, I discovered that anytime I push the throttle about 75-80% or more the clutch will slip and the car will go into neutral. When this happens it will not go into reverse, it will not go into sport mode and it only has first gear, however, once you restart the car everything is fine again. This happens every time without fail, and I have tried driving in RWD as well as AWD. I’m not sure when the transmission fluid was changed last, as I have not owned the car for that long, but I’m sure it wouldn’t hurt to change it, but could that be a solution to this problem? I also tried to perform a DSG reset, however my OBDEleven app was glitching and I could not figure out how to do it. If anyone could help me with information about what may be causing this or how to reset the DSG it would be greatly appreciated! Below I will put the logs for the first two times that the clutch slipped. OBDeleven vehicle history log
Date: 2024-02-07 00:58:06

VIN: WAUDNAF49HN053052
Car:
Year: 2017
Body type: UNKNOWN
Engine: CYMC kW ( hp) l
Mileage: 118783 km

---------------------------------------------------------------
02 Transmission
System description: 0CL 20TFSINAR
Software number: 8W1927155B
Software version: 0004
Hardware number: 0CJ927156
Hardware version: H03

Faults:
P081100 - Excessive Clutch Slippage
Intermittent
Priority - 2
Malfunction frequency counter - 1
Unlearning counter - 255
km-Mileage - 118780 km
Engine speed - 4336 1/min
Driving position - Tiptronic gate
Transmission fluid temperature - 55 °C
Transmission output speed - 652 1/min
Voltage terminal 30 - 14.0 V
Engine torque - 448 Nm
Selected gear - 3
Ctrl. mod., operating condition - Regular operation
Auxiliary pump for transmission, requesting function - Cool clutch
Auxiliary hydraulic pump for transmission oil, current - 39 A
Oil pressure reservoir, pressure - 23.7 bar
Pressure of clutch 1, actual value - 20.3 bar
Pressure of clutch 2, actual value - 2.8 bar
Clutch status - Driving
Dynamic environmental data - 209628131201
date - 2024-02-06 22:08:19

P081E00 - Excessive Clutch "B" Slippage
Intermittent
Priority - 2
Malfunction frequency counter - 1
Unlearning counter - 255
km-Mileage - 118782 km
Engine speed - 3279 1/min
Driving position - Tiptronic gate
Transmission fluid temperature - 53 °C
Transmission output speed - 692 1/min
Voltage terminal 30 - 15.1 V
Engine torque - 472 Nm
Selected gear - 4
Ctrl. mod., operating condition - Regular operation
Auxiliary pump for transmission, requesting function - Cool clutch
Auxiliary hydraulic pump for transmission oil, current - 1 A
Oil pressure reservoir, pressure - 27.2 bar
Pressure of clutch 1, actual value - 2.8 bar
Pressure of clutch 2, actual value - 19.9 bar
Clutch status - Driving
Dynamic environmental data - 209628131201
date - 2024-02-06 22:28:58

spawne32

Tune has been out literally 24 hours. You are going to have to contact IE about that, but it confirms my suspicions at least.

minmet

I assume OP already have the IE ECU tune, right? Just wondering.

spawne32

Yeh seems like they are requiring you to buy their ECU tune for this. APR did tell me today that they have a B9 A4 tcu tune on their roadmap as well.

nighthawk5263

P060A00 - Internal Control Module Monitoring Processor Performance
Intermittent
Priority - 6
Malfunction frequency counter - 1
Unlearning counter - 255
km-Mileage - 118828 km
Engine speed - 734 1/min
Driving position - P
Transmission fluid temperature - 54 °C
Transmission output speed - 0 1/min
Voltage terminal 30 - 13.2 V
Engine torque - 0 Nm
Selected gear - 1
Ctrl. mod., operating condition - Regular operation
Auxiliary pump for transmission, requesting function - Fill hydraulic press. accum.
Auxiliary hydraulic pump for transmission oil, current - 4 A
Oil pressure reservoir, pressure - 16.8 bar
Pressure of clutch 1, actual value - 0.0 bar
Pressure of clutch 2, actual value - 0.1 bar
Clutch status - New
Dynamic environmental data - 20962813120213371913380113390100000013400000134100 40002813420013430213440C134506134655
date - 2024-02-07 13:51:03

nighthawk5263

Yes, I’ve been running their Stage 2 93 octane tune for a while now and have not had any issues until now.

LightningTruck

Interesting. Sounds like what my trans did before I changed the filters.
What happens when you flash back to original Transmission tune, does the problem go away?
.

nighthawk5263

I just flashed to stock trans tune and it was fine, no issues at all.

nighthawk5263

I put the tune back on and completed the following 2 procedures using OBDEleven:

Clutch Engagement Point Adaptation (Calibrate)
Clutch Valve Calibration (Calibrate)

After performing these actions, it seems that I’m able to push the car a lot harder before the clutch slips again. I got a few good launches and pulls before it slipped once again, logs attached below.

Also, I’m not the most literate when it comes to reading some of these logs, but when it says “Auxiliary pump for transmission, requesting function - Filter ATF”, does that mean that it’s time for a new filter?

OBDeleven vehicle history log
Date: 2024-02-08 02:23:26

VIN: WAUDNAF49HN053052
Car:
Year: 2017
Body type: UNKNOWN
Engine: CYMC kW ( hp) l
Mileage: 118871 km

---------------------------------------------------------------
02 Transmission
System description: 0CL 20TFSINAR
Software number: 8W1927155B
Software version: 0004
Hardware number: 0CJ927156
Hardware version: H03

Faults:
P081E00 - Excessive Clutch "B" Slippage
Intermittent
Priority - 2
Malfunction frequency counter - 1
Unlearning counter - 255
km-Mileage - 118860 km
Engine speed - 4277 1/min
Driving position - Tiptronic gate
Transmission fluid temperature - 55 °C
Transmission output speed - 933 1/min
Voltage terminal 30 - 14.3 V
Engine torque - 448 Nm
Selected gear - 4
Ctrl. mod., operating condition - Regular operation
Auxiliary pump for transmission, requesting function - Filter ATF
Auxiliary hydraulic pump for transmission oil, current - 22 A
Oil pressure reservoir, pressure - 26.4 bar
Pressure of clutch 1, actual value - 1.9 bar
Pressure of clutch 2, actual value - 20.0 bar
Clutch status - Driving
Dynamic environmental data - 209628131204
date - 2024-02-08 02:10:02

kosmaras

Interesting to hear this and sorry you're experiencing problems. Really curious what IE says about this. I had clutch slip on their original stage 1 ECU tune, but not enough to throw that clutch slip code. After flashing their TCU tune the clutch slip went away, but I have only tested during 100% throttle.

Did the issue only happen at 70-80% throttle? Or that was the low end of the input that caused it and it was also happening at 100% for you?