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Old Jun 14, 2023 | 10:51 AM
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I have a 2015 Corvette Stingray Convertible with the A8 transmission. I had the triple flush done and now at the first start in the morning when I back it out of the garage and put it in drive there is a hesitation and then a glunk before it goes forward. Anyone have this experience?
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Old Jun 14, 2023 | 12:01 PM
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My former 2016 coupe with the A8 did that as well. Was so hard it like to have shook my fillings lose. Only on the first time moving forward after setting in the garage all night. I found after backing out, placing the shifter in manual and using the paddles for the first couple of shifts helped. I remember being told it had something to do with some part within the transmission having not filled up with enough fluid yet. I know it’s not uncommon, but really gets one’s attention! Sorry I can’t be more specific, but I know someone on here will be able to explain it more thoroughly.
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Old Jun 14, 2023 | 12:18 PM
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Had the flush done, but did not experience anything like that. Possible low fluid level? I'd take it back where you got the triple flush done and ask them to take a look at it.
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Old Jun 14, 2023 | 12:30 PM
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I would think that the engagement of the transmission should be nice and smooth, especially after having had the triple flush procedure done.
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Old Jun 14, 2023 | 01:20 PM
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Originally Posted by TxLefty
Had the flush done, but did not experience anything like that. Possible low fluid level? I'd take it back where you got the triple flush done and ask them to take a look at it.
I agree. I’m surprised as well.

Wish they’d have come up with the new fluid and 3x flush fix when I had my 2016 A8 coupe. Transmission concerns (hard first shift and dancing tachometer) is what ultimately led me to get rid of it. Only had about 7000 miles on it, but it was about to go out of warranty and after reading so many A8 transmission related horror stories I just couldn’t get comfortable with owning it. Have now switched to a 2014 with the A6. Very happy, and so far so good.
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Old Jun 14, 2023 | 01:46 PM
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Google Service Bulletin 16-NA-014. It describes the cause of delayed engagement. Expensive fix when out of warranty.
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Old Jun 14, 2023 | 08:30 PM
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Our 2017 Z51 A8 goes into gear smoothly and quickly every time, but the first 1-2 shift is a lurch.
It can be reduced/eliminated by putting the car in D and then paddling up to 2 and then selecting back into D, all before starting to move (except backing out of garage).
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Old Jun 14, 2023 | 09:06 PM
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Do 2019 ‘s need the flush? Just bought one!
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Old Jun 14, 2023 | 10:01 PM
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None here before and after the triple flush. Did this happen only AFTER the triple flush or before or what?
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Old Jun 14, 2023 | 10:04 PM
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Originally Posted by JMills
Do 2019 ‘s need the flush? Just bought one!
They said Feb of 19 so if your vehicle was made after that, you should be fine.
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Old Jun 14, 2023 | 11:51 PM
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Have your dealer clear adapts and a perform a relearn procedure , you can thank me later 😉

Dave
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Old Jun 15, 2023 | 07:01 AM
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Originally Posted by aklim
They said Feb of 19 so if your vehicle was made after that, you should be fine.
I believe that only the transmissions built after Feb 19 were filled with the correct fluid.

There is a build tag on the side of the trans with its build date.
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Old Jun 15, 2023 | 07:09 AM
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Originally Posted by Gearhead Jim
Our 2017 Z51 A8 goes into gear smoothly and quickly every time, but the first 1-2 shift is a lurch.
It can be reduced/eliminated by putting the car in D and then paddling up to 2 and then selecting back into D, all before starting to move (except backing out of garage).
This process has worked for me.
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Old Jun 15, 2023 | 10:10 AM
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Originally Posted by Gearhead Jim
Our 2017 Z51 A8 goes into gear smoothly and quickly every time, but the first 1-2 shift is a lurch.
It can be reduced/eliminated by putting the car in D and then paddling up to 2 and then selecting back into D, all before starting to move (except backing out of garage).
Interesting. I had a somewhat harsh 1-2 shift, before the triple flush. Now it is as smooth as silk.

The sheer variety of shift feel as well as other mechanical characteristics in operating A8 transmissions makes one wonder a little.
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Old Jun 15, 2023 | 10:14 AM
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Originally Posted by TxLefty
Interesting. I had a somewhat harsh 1-2 shift, before the triple flush. Now it is as smooth as silk.

The sheer variety of shift feel as well as other mechanical characteristics in operating A8 transmissions makes one wonder a little.
I didnt want to wait till something made me and it was part of me getting a used car. It flows, it goes. Didn't feel radically different. Smooth.

Wonder what?
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Old Jun 15, 2023 | 10:18 AM
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Originally Posted by wspo
Google Service Bulletin 16-NA-014. It describes the cause of delayed engagement. Expensive fix when out of warranty.
You are correct. Read the bulletin. Requires dropping the transmission and putting in what appears to be an updated part. Expensive. Other than being annoying, based on the description of the problem, I was unable to determine whether continued use would cause any damage.
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Old Jun 15, 2023 | 10:19 AM
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Originally Posted by aklim
I didnt want to wait till something made me and it was part of me getting a used car. It flows, it goes. Didn't feel radically different. Smooth.

Wonder what?
Wonder about design, quality control, etc.
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Old Jun 15, 2023 | 10:29 AM
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Originally Posted by TxLefty
Wonder about design, quality control, etc.
I believe it was fluid caused. I also believe that like all other manufacturers, they prefer to use existing fluid hoping it would not be such a problem. This time, they lost and we pay for it. No difference from other manufacturers.
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Old Jun 15, 2023 | 10:35 AM
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Originally Posted by aklim
I believe it was fluid caused. I also believe that like all other manufacturers, they prefer to use existing fluid hoping it would not be such a problem. This time, they lost and we pay for it. No difference from other manufacturers.
I hope that is the case. Since the problem apparently appeared after the flush, a low fluid level could be a possible cause. If it is due to the issue in the Service Bulletin it would be an interesting coincidence.
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Old Jun 15, 2023 | 10:40 AM
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Originally Posted by TxLefty
I hope that is the case. Since the problem apparently appeared after the flush, a low fluid level could be a possible cause. If it is due to the issue in the Service Bulletin it would be an interesting coincidence.
Could be like when people change fluid on an old trans and by luck, it breaks so we are told not to change fluid on a transmission that has never had a change.
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