[cellsafemode]

anyone rocking transmission fluid put in your car prior to q1 2019 really should get their trans fluid completely changed with the new blue label stuff (not the black label - which is still sold in some places)

Regardless of if you experience the shake. once you start shaking enough to feel it in more than just your foot (Slightly) ...you are potentially permanently damaging your torque convertor. At that point, you wont know until after you do the change anyway.

It's a fluid hypdrophilia issue ...not manufacturing quirk. All of the A8's had the same fluid before 2019 (including those that got new fluid prior to 2019). The only variable is how long until it exhibits symptoms.

[joekd]

Car is back from the dealer, had to "remind" them that TSB 18-na-355 says that customer reporting the shudder is all the required diagnostics

They did the full fluid exchange exactly as outlined and so far it seems perfect. Most noticeable time it did it was on the highway at steady speed like 65-75 MPH, made sure to do that on the way home and it was perfectly smooth.

[arpad_m]

Originally Posted by joekd

Car is back from the dealer, had to "remind" them that TSB 18-na-355 says that customer reporting the shudder is all the required diagnostics

They did the full fluid exchange exactly as outlined and so far it seems perfect. Most noticeable time it did it was on the highway at steady speed like 65-75 MPH, made sure to do that on the way home and it was perfectly smooth.

That's great, looks like the torque converter is still okay in yours

[joekd]

Originally Posted by arpad_m

That's great, looks like the torque converter is still okay in yours

Car only has 7500 miles, wanted to be sure to get it done ASAP

[SomeGeoffGuy]

Originally Posted by joekd

Car is back from the dealer, had to "remind" them that TSB 18-na-355 says that customer reporting the shudder is all the required diagnostics

I am bringing mine in next Monday. It will be the second time, with the first time resulting in "Concern not Duplicated". Needless to say, I have a copy of the bulletin printed out and highlighted for the service rep. I hate doing that, and I know they hate it when you do, but I am not falling for that again!

-Geoff

[joekd]

Originally Posted by SomeGeoffGuy

I am bringing mine in next Monday. It will be the second time, with the first time resulting in "Concern not Duplicated". Needless to say, I have a copy of the bulletin printed out and highlighted for the service rep. I hate doing that, and I know they hate it when you do, but I am not falling for that again!

-Geoff

Make sure you print out 18-NA-355 and highlight that area

The last TSB 16-NA-175 did not have that wording and the tech would have to replicate it on a test drive, most would just blame AFM (v4) mode as causing the problem you are experiencing

Good luck

[SomeGeoffGuy]

Originally Posted by joekd

Make sure you print out 18-NA-355 and highlight that area

The last TSB 16-NA-175 did not have that wording and the tech would have to replicate it on a test drive, most would just blame AFM (v4) mode as causing the problem you are experiencing

Good luck

Yes, I have the latest. The thing that makes me mad about it is that the NA-355 TSB was published about a month before my first attempt, so the tech just didn't get the update.

Also, found out this morning I have a cracked rim. Trying to get it replaced so I can get in Monday. Love Michigan roads!

-Geoff

[LtColumbo]

I only have about 14,500 miles on my car. While the trans shifts are not ideal, they seem the same as they did on "day one."

BUT, if it is recommended to have the fluid updated regardless, how much of a fight will it be to have this done under the appropriate TSB?

I'm in the north end of the L.A County area. Are there any dealerships around that can actually be recommended??? I'm willing to drive to a dealer who is not going to screw up my car!




What are the chances of having a preemptive repair (torque converter and updated fluid) done with no symptoms at the moment? It is known issue with TSBs
etc.

[MANNAXMAN]

Originally Posted by SomeGeoffGuy

I am bringing mine in next Monday. It will be the second time, with the first time resulting in "Concern not Duplicated". Needless to say, I have a copy of the bulletin printed out and highlighted for the service rep. I hate doing that, and I know they hate it when you do, but I am not falling for that again!

-Geoff

Good luck. The two dealerships closest to me would not perform the service without diagnosing the issue, regardless of what the TSB said. And GM customer service sided with the dealerships. Hopefully you have a better dealership than the ones that are most convenient to me.

[wwiiavfan]

Originally Posted by joekd

Car is back from the dealer, had to "remind" them that TSB 18-na-355 says that customer reporting the shudder is all the required diagnostics

They did the full fluid exchange exactly as outlined and so far it seems perfect. Most noticeable time it did it was on the highway at steady speed like 65-75 MPH, made sure to do that on the way home and it was perfectly smooth.

Now put an AFM delete on it to help keep the boogie man away.

[Blobby]

I got my 2016 new in Dec 2018 (awesome deal). Had shudder so bad that it felt like the ignition was getting flicked on and off rapidly. I suspect permanent damage. I think I got the most recent “fix” in early 2020 at 20k miles. It was perfect for a while, but now at 35k I have quite noticeable shudder. At about 45+ mph in highest gear (lowest RPM possible for constant speed) when I apply power, it shudders. At speed, the auto likes to be around 1800 RPM. A bit low I would think... and the torque converter thinks too apparently.

When it’s cold, it’ll shift a bit harder than I like. It seems to wait to want to down shift when accelerating after constant speed, and sometimes just chills at 2000-2500 rpm for 20 seconds before upshifting when at speed. Sometimes I think that holding in lower gear is the tranny being somewhat smart like when on cruise in hilly terrain.

Anyone know where to go for non-biased news on the class action?
Once warranty is up I’ll get it reprogrammed, but can the mechanics be truly fixed?

[arpad_m]

Originally Posted by Blobby

I got my 2016 new in Dec 2018 (awesome deal). Had shudder so bad that it felt like the ignition was getting flicked on and off rapidly. I suspect permanent damage. I think I got the most recent “fix” in early 2020 at 20k miles. It was perfect for a while, but now at 35k I have quite noticeable shudder. At about 45+ mph in highest gear (lowest RPM possible for constant speed) when I apply power, it shudders. At speed, the auto likes to be around 1800 RPM. A bit low I would think... and the torque converter thinks too apparently.

When it’s cold, it’ll shift a bit harder than I like. It seems to wait to want to down shift when accelerating after constant speed, and sometimes just chills at 2000-2500 rpm for 20 seconds before upshifting when at speed. Sometimes I think that holding in lower gear is the tranny being somewhat smart like when on cruise in hilly terrain.

Anyone know where to go for non-biased news on the class action?
Once warranty is up I’ll get it reprogrammed, but can the mechanics be truly fixed?

Did you get a new torque converter in early 2020, too? If not and yours had sustained permanent damage, which seems to be the case here, the new fluid in itself will only temporarily fix the shudder.

Shift strategies are drive mode specific, plus there is a separate performance shift mode. If you think it should behave differently, the dealership can trigger a relearn, but it's hard to tell whether or not there is an actual problem here—if it holds gears longer at 2.5k rpm prior to upshifting even in tour or snow/ice mode, perhaps you are applying a bit more throttle than it considers necessary. That's the only legit case I can think of, because these autos are very "upshift happy" in order to improve fuel economy.

[Blobby]

Originally Posted by arpad_m

Did you get a new torque converter in early 2020, too? If not and yours had sustained permanent damage, which seems to be the case here, the new fluid in itself will only temporarily fix the shudder.

Shift strategies are drive mode specific, plus there is a separate performance shift mode. If you think it should behave differently, the dealership can trigger a relearn, but it's hard to tell whether or not there is an actual problem here—if it holds gears longer at 2.5k rpm prior to upshifting even in tour or snow/ice mode, perhaps you are applying a bit more throttle than it considers necessary. That's the only legit case I can think of, because these autos are very "upshift happy" in order to improve fuel economy.

No new torque converter. If I remember correctly, that’s the next step according to TSB. They had to try the flush alone first. Will at a minimum make sure my concerns are documented in a couple weeks with my next oil change. The first time I brought it in for the shudder they tried the v4/v6 transition copout.

[SomeGeoffGuy]

Dropped mine off at the dealer for a fluid change. Had to argue with the service writer and shove the service bulletin in front of him. He tried the old "If they can't duplicate it" BS. I told him all he needed was me saying it, and it was the second time I was bringing it in for the same issue, and wasn't playing that game anymore. He didn't say another word and just wrote it up.

Finger's crossed!

-Geoff