View Poll Results: A8 Transmission, TC Failures / Non Failures
Multiple Choice Poll. Voters: 383. You may not vote on this poll
A8 Failures
Racer
Joined: Oct 2016
Posts: 437
Likes: 61
Guys you take it really careful when u check the results.
I just went over all the members list who marked:
Torque converter failure 2017
And NONE of them actually posted an issue with their A8, they might just voted so. I am pretty sure that if someone who has new car would be posted some words about it!
I just went over all the members list who marked:
Torque converter failure 2017
And NONE of them actually posted an issue with their A8, they might just voted so. I am pretty sure that if someone who has new car would be posted some words about it!
Melting Slicks
Joined: Jun 2016
Posts: 2,845
Likes: 520
From: Eastern WA
Agree, care should be taken when reading the results because there are some votes, especially in the 17 category that are false and need to be ignored, but not all of them.
Last edited by djnice; Jan 10, 2017 at 12:56 PM.
Instructor
Joined: Oct 2016
Posts: 101
Likes: 88
Really? Then you may want to take a closer look:
https://www.corvetteforum.com/forums...with-pics.html
https://www.corvetteforum.com/forums...r-failure.html
A couple other guys with 2017's chimed in within these two threads stating their 2017's are exhibiting the same issues.
Granted, CorvettePride, GlassRoad, and QuickRoad should be ignored because they are the same person trolling. However, cjlinares hasn't even voted yet and he is taking his 2017 to Stingray Chevrolet this Wednesday for possible torque converter failure.
I'm not saying the sky is falling and every 2017 is going to be exhibiting failure, but it's already documented that some 2017's are affected. Ask me how I know.
https://www.corvetteforum.com/forums...with-pics.html
https://www.corvetteforum.com/forums...r-failure.html
A couple other guys with 2017's chimed in within these two threads stating their 2017's are exhibiting the same issues.
Granted, CorvettePride, GlassRoad, and QuickRoad should be ignored because they are the same person trolling. However, cjlinares hasn't even voted yet and he is taking his 2017 to Stingray Chevrolet this Wednesday for possible torque converter failure.
I'm not saying the sky is falling and every 2017 is going to be exhibiting failure, but it's already documented that some 2017's are affected. Ask me how I know.
Last edited by KrikGS; Jan 10, 2017 at 06:44 AM. Reason: clarification
Team Owner
Joined: Sep 2005
Posts: 29,113
Likes: 2,194
From: Big Bend Country, TX
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15- '16-'17-‘18-‘19-'20-'21
NCM Lifetime Member
And I haven't voted yet till I hear from my servicing dealer. With luck, by the end of this week.
Safety Car
Joined: May 2016
Posts: 4,488
Likes: 1,028
From: MN
Cautiously optimistic that the late 2015 change did have a positive effect. I think 3 of the 2016 failures in the poll were 2016's made before the 11/15 change. From the experiences above, clearly it was not a complete fix, but might have helped.
I am one of those that has stayed in V8 mode with a Range unit--wonder if this might help in the long run?
I am one of those that has stayed in V8 mode with a Range unit--wonder if this might help in the long run?
Last edited by JonMN; Jan 10, 2017 at 08:57 AM.
Le Mans Master
Joined: Nov 2015
Posts: 7,382
Likes: 3,501
From: Lake Havasu City Arizona
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Le Mans Master
Joined: Nov 2015
Posts: 7,382
Likes: 3,501
From: Lake Havasu City Arizona
Race Director
Joined: Oct 2011
Posts: 15,049
Likes: 1,613
From: Holly Springs NC
St. Jude Donor '16-'17,'22,'24
Really? Then you may want to take a closer look:
https://www.corvetteforum.com/forums...with-pics.html
https://www.corvetteforum.com/forums...r-failure.html
A couple other guys with 2017's chimed in within these two threads stating their 2017's are exhibiting the same issues.
Granted, CorvettePride, GlassRoad, and QuickRoad should be ignored because they are the same person trolling. However, cjlinares hasn't even voted yet and he is taking his 2017 to Stingray Chevrolet this Wednesday for possible torque converter failure.
I'm not saying the sky is falling and every 2017 is going to be exhibiting failure, but it's already documented that some 2017's are affected. Ask me how I know.
https://www.corvetteforum.com/forums...with-pics.html
https://www.corvetteforum.com/forums...r-failure.html
A couple other guys with 2017's chimed in within these two threads stating their 2017's are exhibiting the same issues.
Granted, CorvettePride, GlassRoad, and QuickRoad should be ignored because they are the same person trolling. However, cjlinares hasn't even voted yet and he is taking his 2017 to Stingray Chevrolet this Wednesday for possible torque converter failure.
I'm not saying the sky is falling and every 2017 is going to be exhibiting failure, but it's already documented that some 2017's are affected. Ask me how I know.
Melting Slicks
Joined: Jun 2016
Posts: 2,845
Likes: 520
From: Eastern WA
pulse width controlling the TCC could cause that i bet?
"hmmmn....hmmmn.....hmmmn....hmmmn.. .." no noise, just an oscillating sensation that i've experienced from time to time. but mine is so new i've noticed it when it had only 60 miles on it chalked it up to breaking in, maybe trans learning (locking converter too early) etc.
"hmmmn....hmmmn.....hmmmn....hmmmn.. .." no noise, just an oscillating sensation that i've experienced from time to time. but mine is so new i've noticed it when it had only 60 miles on it chalked it up to breaking in, maybe trans learning (locking converter too early) etc.
I have noticed that some of the Camaro guys are describing a different NVH sensation than the C7 guys. It sounds more like a chatter when going between V4 and V8 and back rather than continual shudder during V4. I am thinking this might be due to the torque tube arrangement or different tuning of how shudder is mitigated. Camaro guys are also getting a different fix. First the dealer is to try doing a fluid flush and filter replacement 3X before doing the TC. I am guessing the flush is to get debris, maybe clutch debris, out of the system to reduce clutch chatter.
It would be great if GM (or aftermarket guys) would give some actual technical debrief for us gear heads.
Drifting
Joined: Apr 2005
Posts: 1,753
Likes: 29
From: McKinney TX
When people say shudder going into v4 do you really mean like a vibration in the car? Is it one vibration or does it shudder the whole time in v4?
When mine goes to v4 I don't have a physical shudder, its very smooth, but I can "feel" when it does it
When mine goes to v4 I don't have a physical shudder, its very smooth, but I can "feel" when it does it
Last edited by SpeedUp; Jan 10, 2017 at 02:06 PM.
Pro
Joined: Jan 2001
Posts: 733
Likes: 225
From: Auburn AL
So my wife told me I ought to buy a new sports car for my 65th birthday. I chose the 15 A8 Z51 you see in my avatar. Now she wants a new one for her 65th too. The general no longer makes the Caddy SRX she loves and have replaced it with the XT5 in 2016. I got excited about finding out about all of the autonomous safety features that she could have but then the salesman on the phone said it also featured an A8 transmission. Just what I need another reason to hold my breath and pray.
Drifting
Joined: Nov 2014
Posts: 1,782
Likes: 106
From: Salado TX
My car was seamless going in and out of V4. The shuddering was while at a constant speed in V4 mode. It was three slight jerks in a row followed by a couple seconds of smooth then three jerks over and over until it went into V8 mode.
Le Mans Master
Joined: Feb 2002
Posts: 9,883
Likes: 518
From: Bergen County NJ
Melting Slicks
Joined: Jun 2016
Posts: 2,845
Likes: 520
From: Eastern WA
I don't think vibration caused by V4 would be so consistent. So its probably the PWM frequency, but still doesn't explain why it jerks. Maybe it is the clutch chattering.
Last edited by djnice; Jan 10, 2017 at 08:07 PM.
