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Old 04-20-2019, 04:39 PM   #43
Budman51
 
Drives: 2023 SGM 1SS
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My 2018 1SS (build date 11/17) had it, starting at just under 1200 miles. I had TSB 18-na-355 performed at 1463 miles, now have 1720 miles, and the car is like a whole 'nuther animal. Shifts are quicker, crisper, and more positive. I live in north central Florida, and the GM corporate line is that the old tranny fluid is hydroscopic, and when it starts absorbing moisture that's when the shudder starts. Makes sense since it gets pretty humid here. The new fluid and flush tool was sent to the southeast dealers first as they said that's where more of the shudder issues originate. Keeping my fingers crossed.
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Old 04-20-2019, 04:45 PM   #44
Need4Camaro

 
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Quote:
Originally Posted by GA Camaro 2SS View Post
Mine is a 17’ 2SS a8. No problems at all. Remember you here more about the bad news than the good. I have no doubt that people are having problems. But I can guarantee they are the minority. I haven’t had any of the 17’ problems. And I’m sure as they go along they try to fix problems that come up. Better to fix it on the line than at the dealer. The 2018 are going to be even more trouble free. I wouldn’t wait because of issues. Unless you think the refresh is going to make a big deal to you go for it. To me the generation change is a bigger deal than a refresh.
They aren't a minority. Its a huge design flaw with the A8, EVERY A8 will have the issue. Some to a more noticable decree than others. Mine didn't start until about 25k miles. If yours hasn't started yet...just give it time, you WILL get the shudder, it isn't a matter of if...but when.
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Old 04-20-2019, 05:12 PM   #45
T32803
 
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There are plenty of people with 2018s who commented in many
treads that they have shudder also. Do a search. Better yet, buy
the Manual Trans.
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Old 04-20-2019, 07:11 PM   #46
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Quote:
Originally Posted by Need4Camaro View Post
They aren't a minority. Its a huge design flaw with the A8, EVERY A8 will have the issue. Some to a more noticable decree than others. Mine didn't start until about 25k miles. If yours hasn't started yet...just give it time, you WILL get the shudder, it isn't a matter of if...but when.
Mine won't :P, but of course that comes at a cost few are willing to pay
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735 rwhp | 665 rwtq

Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle terminator cam | LT4 FS & injectors | TSP forged pistons & rods
JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE custom tune

1100 - 1/30/18 | 2000 - 1/31/18
3000 - 2/06/18 TPW 2/26/18
3400 - 2/19/18 | 3800 - 2/26/18
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Old 04-20-2019, 11:16 PM   #47
Need4Camaro

 
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Originally Posted by arpad_m View Post
Mine won't :P, but of course that comes at a cost few are willing to pay
What exactly did you do? I was assuming replacing the TC and getting a tune?

I'd be willing to do it but Im very afraid of ruining the warranty on this car.
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Old 04-20-2019, 11:29 PM   #48
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Quote:
Originally Posted by Need4Camaro View Post
They aren't a minority. Its a huge design flaw with the A8, EVERY A8 will have the issue. Some to a more noticable decree than others. Mine didn't start until about 25k miles. If yours hasn't started yet...just give it time, you WILL get the shudder, it isn't a matter of if...but when.
And to add to your point,how many folks have the shudder and aren't members of this forum,or any forum.This thread and forum saved me from an A8 back in January,for which I am grateful.
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Old 04-21-2019, 12:11 AM   #49
matt fe2o3
 
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I have 11k on my 18' 2SS A8 and no problem.
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Old 04-21-2019, 06:17 AM   #50
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Quote:
Originally Posted by Budman51 View Post
My 2018 1SS (build date 11/17) had it, starting at just under 1200 miles. I had TSB 18-na-355 performed at 1463 miles, now have 1720 miles, and the car is like a whole 'nuther animal. Shifts are quicker, crisper, and more positive. I live in north central Florida, and the GM corporate line is that the old tranny fluid is hydroscopic, and when it starts absorbing moisture that's when the shudder starts. Makes sense since it gets pretty humid here. The new fluid and flush tool was sent to the southeast dealers first as they said that's where more of the shudder issues originate. Keeping my fingers crossed.
I have about 600 miles since the TSB 18-NA-355 flush and so far so good.
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Old 04-21-2019, 06:33 AM   #51
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Originally Posted by karmatourer View Post
And to add to your point,how many folks have the shudder and aren't members of this forum,or any forum.This thread and forum saved me from an A8 back in January,for which I am grateful.
Same can be said for non forum members that own 2018s with A8s especially built after March 2017 that haven’t had issues or had issues that have been resolved.
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Old 04-21-2019, 07:42 AM   #52
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A few thousand miles after my NA-18-355 flush and still running strong.
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Old 04-21-2019, 08:53 AM   #53
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Does anybody have a video of what exactly the shudder sounds like?
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Old 04-21-2019, 09:13 AM   #54
Yanniz
 
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Quote:
Originally Posted by Azerlazer26 View Post
Does anybody have a video of what exactly the shudder sounds like?
That is a great question. That would help a lot of us that are wondering what to look for.

I have 32K on my 2017, and it is fine.

Per Chevy if it hasn’t happened by now it won’t happen, but you never know.
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Old 04-21-2019, 09:40 AM   #55
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Quote:
Originally Posted by Azerlazer26 View Post
Does anybody have a video of what exactly the shudder sounds like?
The best way I can describe it is that it feels like the road is rough, almost like going over mild rumble strips.
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Old 04-21-2019, 09:51 AM   #56
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My 17 started the shutter at about 4k miles, had it flushed at dealer (11/2018), fine since, but only at 7.5k now. I really love the car but I'm not going to worry myself sick over it. Life's got so many complications, worrying about this one isn't worth it to me. If it continues to work fine that's great, if not I'll get it fixed or trade it... whatever. Good luck with your decision.
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