Allroad Transmission Problem

[DavidAR]

The transmission on my 2015 Allroad is acting a bit strange. Seems to be only present when cold. The symptom is rapid jerking while going at a steady speed of around 30 MPH. Almost like it is searching for the right gear. Occurs in all drive modes. Doesn't seem to make any difference whether it's in comfort, dynamic or automatic mode. Anyone experience this? Goes away when the transmission warms up and there is 60K miles on the car.

[JLAllroad]

Have you scanned for codes) need something like VCDS to identify possible soft codes, would also like to see clutch adaptations.


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[DavidAR]

I have VCDS but didn't occur to me that there could be transmission fault codes. Will give it a try. Thanks.

[JayDog747]

It's time to change the fluid.

[DavidAR]

It's time to change the fluid.

I thought about that possibility. Has anyone tried the Valvoline full synthetic in the red gallon jug? The Audi product is pretty pricey. I have used it in my C5 Allroad without any problems.

[DavidAR]

Did a scan using VCDS today and came up with this.

-------------------------------------------------------------------------------
Address 02: Auto Trans (J217) Labels:| 0BK-927-156.clb
Part No SW: 8K0 927 158 AE HW: 0BK 927 156 AL
Component: 0BK 20TFSIUSA H19 1004
Revision: --H19--- CVN: 75154AA3
Coding: 000001
Shop #: WSC 00000 000 00000
ASAM Dataset: EV_TCMAL551211 002022
ROD: EV_TCMAL551211_002_AU48.rod
VCID: 79F910B7F8F56B5E8C-802C

No fault code found.

However, on an unrelated note this DTC showed up without the CEL coming on.


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Address 01: Engine (DET-CPMB) Labels:. 06H-907-115-CDN.clb
Part No SW: 8K5 907 115 N HW: 8K2 907 115 L
Component: 2.0l R4/4V TF H09 0005
Revision: ECH09--- CVN: FE64ECCA
Coding: 722A0013242600062000
Shop #: WSC 48194 002 1048576
ASAM Dataset: EV_ECM20TFS0118K5907115N 001006
ROD: EV_ECM20TFS0118K5907115N.rod
VCID: 3D71C4A7AC5D977EE0-8068
VINID: 9D106559159C0564410011001C49FC8E0B

1 Fault Found:
18062 - Coolant Pump 2
P261A 00 [01100000] - Open circuit
Intermittent - Not Confirmed - Tested Since Memory Clear

[JLAllroad]

Did a scan using VCDS today and came up with this.

-------------------------------------------------------------------------------
Address 02: Auto Trans (J217) Labels:| 0BK-927-156.clb
Part No SW: 8K0 927 158 AE HW: 0BK 927 156 AL
Component: 0BK 20TFSIUSA H19 1004
Revision: --H19--- CVN: 75154AA3
Coding: 000001
Shop #: WSC 00000 000 00000
ASAM Dataset: EV_TCMAL551211 002022
ROD: EV_TCMAL551211_002_AU48.rod
VCID: 79F910B7F8F56B5E8C-802C

No fault code found.

However, on an unrelated note this DTC showed up without the CEL coming on.


-------------------------------------------------------------------------------
Address 01: Engine (DET-CPMB) Labels:. 06H-907-115-CDN.clb
Part No SW: 8K5 907 115 N HW: 8K2 907 115 L
Component: 2.0l R4/4V TF H09 0005
Revision: ECH09--- CVN: FE64ECCA
Coding: 722A0013242600062000
Shop #: WSC 48194 002 1048576
ASAM Dataset: EV_ECM20TFS0118K5907115N 001006
ROD: EV_ECM20TFS0118K5907115N.rod
VCID: 3D71C4A7AC5D977EE0-8068
VINID: 9D106559159C0564410011001C49FC8E0B

1 Fault Found:
18062 - Coolant Pump 2
P261A 00 [01100000] - Open circuit
Intermittent - Not Confirmed - Tested Since Memory Clear

There was a TSB for an afterrun pump, part one was to unplug it as it was a fire hazard, this also extended the turbo warranty, part two was to replace the pump once the revised pump was available, maybe yours never got the second half?


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[DavidAR]

There was a TSB for an afterrun pump, part one was to unplug it as it was a fire hazard, this also extended the turbo warranty, part two was to replace the pump once the revised pump was available, maybe yours never got the second half?


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The dealer should have a record of this. I vaguely remember taking it in for a recall. Don't remember going twice.

[DavidAR]

Just called the dealer and the follow up was completed in May of 2019. He indicayed the pump was replaced after the initial visit plugged it off. Looks like the pump may have failed.

[4xaudi]

I thought about that possibility. Has anyone tried the Valvoline full synthetic in the red gallon jug? The Audi product is pretty pricey. I have used it in my C5 Allroad without any problems.

I used this fluid with zero issues. Also replace the filter and use the VCDS to insure you are at the correct transmission temperature when refilling. I used about 5 liters of fluid when I did mine. https://www.fcpeuro.com/products/lif...r-s67109031201

[DavidAR]

I used this fluid with zero issues. Also replace the filter and use the VCDS to insure you are at the correct transmission temperature when refilling. I used about 5 liters of fluid when I did mine. https://www.fcpeuro.com/products/lif...r-s67109031201

Thanks for the link. Yes, temperature is important. I have used VCDS to monitor temperature when changing fluid in my C5.

[Jake@JHM]

The transmission on my 2015 Allroad is acting a bit strange. Seems to be only present when cold. The symptom is rapid jerking while going at a steady speed of around 30 MPH. Almost like it is searching for the right gear. Occurs in all drive modes. Doesn't seem to make any difference whether it's in comfort, dynamic or automatic mode. Anyone experience this? Goes away when the transmission warms up and there is 60K miles on the car.

What trans temp does the issue go away at? Is it actually going in and out of gear when this is happening?

[DavidAR]

What trans temp does the issue go away at? Is it actually going in and out of gear when this is happening?

I haven't had VCDS connected while driving so I don't know the temperature. When cold , the car accelerates and shifts properly with no sounds. When I reach 30 mph on level road and the transmission is in fourth gear and I apply light throttle the car begins to jerk. Not violent but repeated hesitations. The tach is staying constant so I don't believe it is actually changing gears. After driving 5 miles or so I am unable to repeat it, I have paddle shifters and they work fine going up and down through the gears when cold and hot.

[DavidAR]

Changed ATF and filter. Used Liqui-Moly and Hengst filter. Fluid was slightly contaminated , but not too bad. Still jerking when engine under load at low RPM when cold. NO CEL and found no codes when I scanned with VCDS. Got me thinking about possible defective coil pack. Replaced plugs and coil packs yesterday so will see if problem is solved. Puzzled as to not receiving a code if indeed there was a defective coil pack? Original plugs looked great at 60K miles, but I went ahead and replaced them with NGK's. Will be able to test drive tomorrow.

[DavidAR]

Drove the car this morning with temperature around 10 degrees. Still jerking in first gear when I lock it in manually and drive it under 20 MPH. I also have Audi drive and does it in automatic, comfort and dynamic modes. Jerking goes away after driving 4-5 miles. Seems to be temperature related. I will see if there are any codes using VCDS.

[JLAllroad]

What fuel and tune are you using?

What coil packs and spark plugs?

Did you ever pull clutch adaptation counts? Did you reset adaptations and do an adaptation drive after your fluid change?

[DavidAR]

What fuel and tune are you using?

What coil packs and spark plugs?

Did you ever pull clutch adaptation counts? Did you reset adaptations and do an adaptation drive after your fluid change?

I am using Shell Nitro 93 Octane. Coil packs are Bremi with NGK plugs and stock tune. I really don't think it is engine related as there are no codes indicating a misfire. No CEL. The slight jerking disappears when the car has been driven 4-5 miles. I am not familiar with clutch adaptation counts. How is that done?

[JLAllroad]

You can pull clutch adaptation counts and reset them via VCDS, similarly you should do an adaptation drive after a trans service and reset. Prior to you need to ensure the trans was filled properly.

[DavidAR]

You can pull clutch adaptation counts and reset them via VCDS, similarly you should do an adaptation drive after a trans service and reset. Prior to you need to ensure the trans was filled properly.

Thanks for the info. I will try and do this in a couple of days. My independent Audi mechanic performed the fluid change. Way to cold right now for me to do it! I'm pretty sure it was done properly. Because the symptoms go away once warmed up is puzzling. Seems like a fluid viscosity issue at low temperatures or maybe low.

[DavidAR]

My previous notion of not being an engine problem may be wrong. Yesterday I started the engine from a cold state (30 degrees F) and engaged drive with my foot on brake. I gradually increased engine RPM up to 2K. While doing this I was able to replicate the jerking I was getting while actually driving the car. Once I got to 2K I held it there and continued to feel jerking sensation, After a few seconds engine RPM dropped to 1K and I couldn't get it back to 2K unless I released the throttle. At that point I could once again accelerate to 2K and hold for a few seconds before dropping back to 1K. Could there be a carbon build up on the intake valves? When the engine is thoroughly warmed up I can repeat the procedure with no jerking and I can hold the throttle at 2 K without it dropping back to 1K. At this point I think the problem is engine related and not transmission. What's puzzling is there are no fault codes for either transmission or engine. If it is carbon related why are the symptoms only there with a cold startup? Really puzzling.

[JLAllroad]

Pull misfires by cylinder and see if there’s an outlier, carbon is rarely the cause and cleaning is rarely a fix, you might have a lazy injector, you could also do a compression test for giggles.

[RPMtech147]

It's time to change the fluid.

If no faults, that's the first thing I'd do. As the fluid breaks down it doesn't allow the converter to slip properly and causes jerking. Same thing happened to mine. Flushed with Audi spec fluid (Not the exact Audi fluid, but 100% compatible)and corrected all my jerking/stalling issues when cold. You'd have to do your research to find the proper fluid without buying the OE stuff.

[DavidAR]

It appears my problem (jerking at cold temperatures), was indeed the engine. I used VCDS with advanced measurements to log misfires. All four cylinders were misfiring until the engine reached operating temperature and then stopped. When I did the scan there were no fault codes. I have installed new coil packs and plugs. Is it logical to assume a carbon problem? If so , what is the remedy?

Address 01: Engine (8K5 907 115 N)

16:40:36
IDE00021 Engine speed 699 /min
IDE01773 Misfire totalizer 0
IDE01975 Numb.of misfir.: cylinder 1 9707
IDE01976 Numb.of misfir.: cylinder 2 1195
IDE01977 Numb.of misfir.: cylinder 3 772
IDE01978 Numb.of misfir.: cylinder 4 8726

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