[ANSWERED] C7 A8 Transmission and Torque Convertor Questions
#21
Racer
The bulletin is now being updated to have the converters replaced instead of just a flush since it has not been 100% effective.
I really want my car fixed!
Last edited by roSSco; 04-09-2016 at 05:32 PM.
#22
Is he saying the new updated T/C only applies to Z51 cars? I don't understand what he is saying?
#25
Le Mans Master
not sure if this is in the same room but they just replaced my A8 in my 2015. What would happen is when cold no issue when hot no issue. But let it sit awhile and when you start car and put in drive nothing happens for a few seconds and wham it lurches forward. GM tech support told dealer not to open transmission but send it back to support and they sent new transmission and reinstalled. Now 4000 miles later it's doing the same thing again. Waiting to find out what factory discovered the first time around.
#26
not sure if this is in the same room but they just replaced my A8 in my 2015. What would happen is when cold no issue when hot no issue. But let it sit awhile and when you start car and put in drive nothing happens for a few seconds and wham it lurches forward. GM tech support told dealer not to open transmission but send it back to support and they sent new transmission and reinstalled. Now 4000 miles later it's doing the same thing again. Waiting to find out what factory discovered the first time around.
#27
not sure if this is in the same room but they just replaced my A8 in my 2015. What would happen is when cold no issue when hot no issue. But let it sit awhile and when you start car and put in drive nothing happens for a few seconds and wham it lurches forward. GM tech support told dealer not to open transmission but send it back to support and they sent new transmission and reinstalled. Now 4000 miles later it's doing the same thing again. Waiting to find out what factory discovered the first time around.
#28
Le Mans Master
Member Since: Nov 2015
Location: Lake Havasu City Arizona
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My build date for the car is Oct 15. Have 6600 miles on it now and just got back from a 2600 mile road trip. Never any issues. Worked like a champ. It is a base car LT1 and I added the A8 as one of the options.
Last edited by joemessman; 04-16-2016 at 10:14 AM.
#29
Le Mans Master
The following 2 users liked this post by jimman:
CorvetteBrent (02-16-2018),
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#30
Advanced
Replaced Torque Converter Question for Tadge..
Hopefully I'm asking this in the correct area..
2015 Z51 - A8 - Automatic - purchased 5/21/15
2000 miles took in b/c of surging and when stopping felt like someone had rear ended me. I actually got out the vehicle and checked to make sure everything was still intact.
Rick Hendrick performed:
2810175 - Transmission Control Module Reprogramming SPS
Car ran fine until 6000 miles, started up same issues, but not as bad.
8000 miles car not running properly 100% of time, surging, vibrating, shudder - felt like if you were driving a manual and had in wrong gear - whole car was shaking.
This week - Rick Henrick performed:
Torque Converter Shudder Bulletin # pip5337d.
Replaced Torque Converter and Trans filter, flushed cooler (Flush code: fb49f53, .5 gpm @ 74 deg f, cycle 1023). Flashed tcm with the latest software. Test drove 8464810 12.1
24268875 Filter 4.197
24279495 Converter 4.115
19331925 Fluid 8.800 387911
19331925 Fluid 8.800 387963
24279495 Core Return.
From reading your previous post - should the new Converter not be part # 24274892.
Picked up car today - ran fine for 30 miles parked. Just started it up and it is surging, rpm up/down and steady speed. Also, just experienced shudder/Vibration.
Thoughts appreciated...
#31
Drifting
Hopefully I'm asking this in the correct area..
2015 Z51 - A8 - Automatic - purchased 5/21/15
2000 miles took in b/c of surging and when stopping felt like someone had rear ended me. I actually got out the vehicle and checked to make sure everything was still intact.
Rick Hendrick performed:
2810175 - Transmission Control Module Reprogramming SPS
Car ran fine until 6000 miles, started up same issues, but not as bad.
8000 miles car not running properly 100% of time, surging, vibrating, shudder - felt like if you were driving a manual and had in wrong gear - whole car was shaking.
This week - Rick Henrick performed:
Torque Converter Shudder Bulletin # pip5337d.
Replaced Torque Converter and Trans filter, flushed cooler (Flush code: fb49f53, .5 gpm @ 74 deg f, cycle 1023). Flashed tcm with the latest software. Test drove 8464810 12.1
24268875 Filter 4.197
24279495 Converter 4.115
19331925 Fluid 8.800 387911
19331925 Fluid 8.800 387963
24279495 Core Return.
From reading your previous post - should the new Converter not be part # 24274892.
Picked up car today - ran fine for 30 miles parked. Just started it up and it is surging, rpm up/down and steady speed. Also, just experienced shudder/Vibration.
Thoughts appreciated...
2015 Z51 - A8 - Automatic - purchased 5/21/15
2000 miles took in b/c of surging and when stopping felt like someone had rear ended me. I actually got out the vehicle and checked to make sure everything was still intact.
Rick Hendrick performed:
2810175 - Transmission Control Module Reprogramming SPS
Car ran fine until 6000 miles, started up same issues, but not as bad.
8000 miles car not running properly 100% of time, surging, vibrating, shudder - felt like if you were driving a manual and had in wrong gear - whole car was shaking.
This week - Rick Henrick performed:
Torque Converter Shudder Bulletin # pip5337d.
Replaced Torque Converter and Trans filter, flushed cooler (Flush code: fb49f53, .5 gpm @ 74 deg f, cycle 1023). Flashed tcm with the latest software. Test drove 8464810 12.1
24268875 Filter 4.197
24279495 Converter 4.115
19331925 Fluid 8.800 387911
19331925 Fluid 8.800 387963
24279495 Core Return.
From reading your previous post - should the new Converter not be part # 24274892.
Picked up car today - ran fine for 30 miles parked. Just started it up and it is surging, rpm up/down and steady speed. Also, just experienced shudder/Vibration.
Thoughts appreciated...
#32
New Torque Convertor now
My 2015 Z-51 Vert is in the shop now in Oklahoma. They called and said they will be installing a new TC in it for me. I started seeing issues around 7K now just turned 16K miles. Hope this is the fix.
#33
Cruising
Tc replaced no help
I have a 2016 z06. 'first the diff started making a wine noise along with a shutter from the trans. All started at about 3 thousand miles. They replace the rear end about a mouth ago.
Yeah the noise went away but the shutter got worse. I took it in and they than replaced the TC. Seemed a lot better for about 200 miles and now just as bad as ever. A shutter under acceleration almost always.
I have retained an attorney and sent a demand letter to GM for my money back. Lemon law.
I love this car like no other I have ever owned. Just so fun to drive but can not put up with the shutter. I am going to buy another one 2017 and if it does the same thing I will lemon it also and that will be the end of it. Good luck all and I am hoping that my problems are isolated and the next one is good.
Yeah the noise went away but the shutter got worse. I took it in and they than replaced the TC. Seemed a lot better for about 200 miles and now just as bad as ever. A shutter under acceleration almost always.
I have retained an attorney and sent a demand letter to GM for my money back. Lemon law.
I love this car like no other I have ever owned. Just so fun to drive but can not put up with the shutter. I am going to buy another one 2017 and if it does the same thing I will lemon it also and that will be the end of it. Good luck all and I am hoping that my problems are isolated and the next one is good.
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CorvetteBrent (02-16-2018)
#34
I have a 2016 z06. 'first the diff started making a wine noise along with a shutter from the trans. All started at about 3 thousand miles. They replace the rear end about a mouth ago.
Yeah the noise went away but the shutter got worse. I took it in and they than replaced the TC. Seemed a lot better for about 200 miles and now just as bad as ever. A shutter under acceleration almost always.
I have retained an attorney and sent a demand letter to GM for my money back. Lemon law.
I love this car like no other I have ever owned. Just so fun to drive but can not put up with the shutter. I am going to buy another one 2017 and if it does the same thing I will lemon it also and that will be the end of it. Good luck all and I am hoping that my problems are isolated and the next one is good.
Yeah the noise went away but the shutter got worse. I took it in and they than replaced the TC. Seemed a lot better for about 200 miles and now just as bad as ever. A shutter under acceleration almost always.
I have retained an attorney and sent a demand letter to GM for my money back. Lemon law.
I love this car like no other I have ever owned. Just so fun to drive but can not put up with the shutter. I am going to buy another one 2017 and if it does the same thing I will lemon it also and that will be the end of it. Good luck all and I am hoping that my problems are isolated and the next one is good.
#35
C7 Shudder
So My 2015 Z51 has this shudder primarily when in 4Cyl mode while I am just cruising along and then here comes the shudder. So do I as I read this take and have Chevy replace the TC? Sounds like it. Seems to happen allot. Only has 3K miles on it so far but this drives me nuts when it happens. Takes that nice cruise along the highway fun away when the shudder happens.
#36
So My 2015 Z51 has this shudder primarily when in 4Cyl mode while I am just cruising along and then here comes the shudder. So do I as I read this take and have Chevy replace the TC? Sounds like it. Seems to happen allot. Only has 3K miles on it so far but this drives me nuts when it happens. Takes that nice cruise along the highway fun away when the shudder happens.
#37
Naples FL
'16 z51
I thought I was one of the lucky one's and dodged this issue; I am about to turn 41k miles; scheduled Tuesday for triple flush; I hope it works!
why doesn't GM allow a waiver to owners and disable AFM; it appears it is the cause of this issue. I hope this fix works; I dread the thought of TC/Trans replacement.
i have owned to many Corvettes for this to be acceptable. Build date: 9/15.
why doesn't GM allow a waiver to owners and disable AFM; it appears it is the cause of this issue. I hope this fix works; I dread the thought of TC/Trans replacement.
i have owned to many Corvettes for this to be acceptable. Build date: 9/15.
#38
Le Mans Master
Member Since: Nov 2015
Location: Lake Havasu City Arizona
Posts: 7,326
Received 3,439 Likes
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I thought I was one of the lucky one's and dodged this issue; I am about to turn 41k miles; scheduled Tuesday for triple flush; I hope it works!
why doesn't GM allow a waiver to owners and disable AFM; it appears it is the cause of this issue. I hope this fix works; I dread the thought of TC/Trans replacement.
i have owned to many Corvettes for this to be acceptable. Build date: 9/15.
why doesn't GM allow a waiver to owners and disable AFM; it appears it is the cause of this issue. I hope this fix works; I dread the thought of TC/Trans replacement.
i have owned to many Corvettes for this to be acceptable. Build date: 9/15.
#39
Instructor
Tadge evidently doesn't think that there is a problem. It's clear that there is a problem with the 8-speed. Perhaps if they have enough buy-backs the light will shine in. It also exists on the trucks. So, if you have the problem, keep the records and file a lemon law complaint. Do NOT sign any agreement when purchasing the car that you agree to arbitration and waive your rights. If the dealer refuses to sell you the car without the waiver, walk away, quickly. I understand there are rumors that the next gen will have the 10-speed co-developed with Ford. The 8-speed is snake-bit from what I hear in the industry. Owners should have a diminished-value claim against GM.