[SomeGeoffGuy]

I wouldn't take it to a random shop just to save a few bucks. When I had mine done - the dealer told me the fluid was $20 a quart and he used 20 quarts. So you are starting off at $400 minimum. And if the shop uses the wrong fluid, you are SOL.

-Geoff

[ctrlz]

Originally Posted by cengell

1 thing I do is downshift with the paddles to save some wear on the brakes, and maybe this could contribute to the surging/shuttering in the torque converter?

Downshifting to slow the car will certainly contribute to wear on the transmission.
Based on what you are reporting, I think it is likely your torque converter is past the point where a fluid swap will help. But it is your $400.

I'm going to jump on my soap box for the next bit, no offense intended:

Downshifting to slow the car is not a good idea for daily driving. For track driving, the situation is different.
The old, obvious rule holds true: brakes are cheap and easy to replace. Clutches in any transmission are hard to get to, and expensive to replace.

Brakes use all 4 wheels to stop, with 80% of the force contributed by the front brakes. Downshifting uses 2 wheels to slow the car, and in our case it's the rear wheels, requiring a lot more effort to slow the car.

[MANNAXMAN]

Originally Posted by arpad_m

The TSB also states that reproduction of the customer concern is no longer a requirement (it used to be before 2019), your word should be enough:

This varies from dealership to dealership. Some dealerships will still insist on diagnosing the issue. And GM Customer Service is no help. Ask me how I know.

[arpad_m]

Originally Posted by MANNAXMAN

This varies from dealership to dealership. Some dealerships will still insist on diagnosing the issue. And GM Customer Service is no help. Ask me how I know.

Sorry to hear about your experience, it's on their part. The silver lining is that it's a very easy way to find out which service department(s) you never want to give your car to.

[MANNAXMAN]

Originally Posted by arpad_m

Sorry to hear about your experience, it's on their part. The silver lining is that it's a very easy way to find out which service department(s) you never want to give your car to.

The problem is it's the three closest dealerships to me.

[cengell]

Thanks all, I will take it to a GM shop and everything makes sense... Do you think can the GM dealer look in the ECU and see that it has Shuttering/Surging with the GM software?

Also I do like the idea of tuning the transmission as in a few months I will be out of warranty with GMPP and for sure like the tuning and better shifting as sometime it's very noticeable and don't like that feeling.

Update after I get it done..

Thanks for very much for the advice!
Christopher

[arpad_m]

Originally Posted by cengell

Thanks all, I will take it to a GM shop and everything makes sense... Do you think can the GM dealer look in the ECU and see that it has Shuttering/Surging with the GM software?

Also I do like the idea of tuning the transmission as in a few months I will be out of warranty with GMPP and for sure like the tuning and better shifting as sometime it's very noticeable and don't like that feeling.

Update after I get it done..

Thanks for very much for the advice!
Christopher

You're welcome

As to your question, no, they will not do that. First, GM will never admit that their transmission tune may have contributed to this, because that's a ginormous class action lawsuit right there, bigger than the one already filed against them. They used the A8 across their vehicle portfolio from sedans through sports cars to trucks, and in fact they may still be using it in model year 2024. Second, all a dealership is willing to do is blindly flash the latest applicable GM module software, they will not opine on quality, and absolutely will not officially advise you on custom software modifications (aka tuning).

Good luck, hope your story will have a happy ending

[cengell]

Thank you! Once I get the A8 Flushing done under warranty or pay $200, I will update post..

Again appreciate your and others info!

Christopher

[cengell]

Well update! Took my 2017 to my local Chevy GM, and I set appt and brought the TSB as well when I made the Appt told them Surging/Shutter and after he entered the info then said it will be $365.00 for the transmission specialist to inspect it and I said per the TSB needs a flush and he said need that tech to look at it.


I got the feeling it was a money grab and took my paperwork and left. Not very happy! I was so mad that I did not ask what would be the just do the TSB and do the flush.


So my next step is to call a few other Chevy GM dealers and ask would they do the TSB Flush without a cost to me?


I think at least this dealership want to get the $365 to troubleshoot to justify the the transmission tech? I'm not very happy right now over this and maybe I will find a dealership that not require almost $400 just for troubleshooting as I have not had any Surging since a few months ago. I really don't think I have experienced the Shuttering yet. In the TSB it only talks about the Shuttering and nothing about Surging that I experienced 1 or 2 times. I read a fuel filter could be the cause but I I'm am not sure as don't think a fuel filter would cause the tack at 1500-1600 RPM to go up and down in cruse control at 55MPH on flat road.



I hope I can more advice on this and welcome any input.


Thanks
Christopher

[arpad_m]

Here's an excerpt from the TSB, see the green highloght.

The service department should do the procedure on your word alone, zero need for transmission tech diagnostics and paying hundreds of dollars.

[cengell]

Originally Posted by arpad_m

Here's an excerpt from the TSB, see the green highloght.

The service department should do the procedure on your word alone, zero need for transmission tech diagnostics and paying hundreds of dollars.

I showed them that and told them that, but I really think the dealer is trying to get $300 from me or anyone on top of what GM will pay them for the TSB, if GM will pay this dealership. So I think that's what's going on here with that dealer.

Only good new so far I have not felt this issue since when I posted, but I understand and when I can call around my dealers, like the local GM and Cady dealers and see what they say when I call them about the TSB and report back..

Thank everyone!
Christopher

[Sbrigati]

Hey guys I recently started feeling the transmission shudder around 30k on my car. Happened on the highways cruising with light throttle input, as well as round town (once again cruising and very light throttle input).

I then finally decided to to a trans fluid change at around 37k, did this myself with the Mobil 1 Synthetic LV ATF HP (Blue Label). I emptied out about 7 quarts and put in 7 respectively as well as changing the filter. I used the same gasket though (GM says its reusable and it still was in good shape)

I can say that it has now been over 1000km and it has yet to shudder, not even once! As weird as this may sound, I feel that there are some moments where the car still wants to shudder/is on the cusp to shudder in those low throttle cruise situations but I have yet to find it ever crossing that threshold and actually doing it.

My plan is to do a second fluid change again in the spring to get rid of the remaining "old fluid" since the car is supposed to hold over 10 quarts, so 30%+ old stuff still in the system. I'm hoping this will make it as smooth as butter and not have any more issues in the future

But I highly recommended everyone doing at the minimum this fluid change as it has fixed the problem for me!

Just as an FYI the dealer wanted to charge me $1200 taxes included for the full flush. On just the change (not a full flush), it cost me $120 for the 7 quarts of fluid and then $30 for the filter

[cengell]

Hi all, I have not had the transmission/Torque converter fluid replaced and so far no return of the Shutting issue. I travel for work, drive and flying. I now have 70K miles and would like to see what it cost? I think $1200 is crazy IMO. I will call around as I just received check engine lite P0019, but not 100% if it has anything to do with the transmission/torque converter. I posted in a new post asking more info on P0019 code..

Not sure if 1 has to do with the other? Thank you for any info..

Christopher

I just found a list of Camaro codes and it shows P0019 Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor B), so maybe a timing belt or Bank 2 Sensor B issue?

[arpad_m]

Originally Posted by cengell

I will call around as I just received check engine lite P0019, but not 100% if it has anything to do with the transmission/torque converter. I posted in a new post asking more info on P0019 code..

Not sure if 1 has to do with the other? Thank you for any info..

Christopher

I just found a list of Camaro codes and it shows P0019 Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor B), so maybe a timing belt or Bank 2 Sensor B issue?

P0019 doesn't look related to your transmission.

Originally Posted by cengell

Hi all, I have not had the transmission/Torque converter fluid replaced and so far no return of the Shutting issue.

$1200 isn't pleasant, but I wouldn't call it "crazy" to have to do this once over the lifetime of the car, especially GM being GM. Ask the A10 guys who now have to deal with a valve body issue that can cause the rear wheels to lock up on the highway... no fix from GM, gotta buy an aftermarket valve body kit and rebuild the transmission, I bet it'll cost way more. You at least get a new torque converter with a brand new clutch.

That said, if you have no shudder at all, you shouldn't need a new torque converter, only the new fluid (which is almost due anyway at 70K miles), it should be much cheaper. I would not procrastinate but get it done ASAP.