A8 Shudder - do you have it? - Page 31

Gray50 · 05-14-2019, 06:48 PM

Quote:

Originally Posted by socalcowboysss

Hey Guys,

Tons of great information about the A8 Shudder, I have been having that issue for some time now. I took it the dealer their response we can not recreate the problem so the car is fine. I printed out the TSB-NA-355 and spoke to a GM rep and they told me without the recreating of the issue they could not help. I am very frustrated to say the least, what suggestions might you guys have to try and get this issue fixed? Obviously it is an issue that this transmission has and needs to be addressed.

Go to a different dealer.

arpad_m · 05-14-2019, 09:51 PM

Quote:

Originally Posted by socalcowboysss

Hey Guys,

Tons of great information about the A8 Shudder, I have been having that issue for some time now. I took it the dealer their response we can not recreate the problem so the car is fine. I printed out the TSB-NA-355 and spoke to a GM rep and they told me without the recreating of the issue they could not help. I am very frustrated to say the least, what suggestions might you guys have to try and get this issue fixed? Obviously it is an issue that this transmission has and needs to be addressed.

Pardon the naive question, but did you ask for a tech to ride with you while you reproduce the issue, or did they just drive the car without you and came back saying they couldn't repro it? I guess you know exactly how to trigger the shudder, right?

classicrockr · 05-20-2019, 09:06 AM

Dealer told me today that the picoscope indicated no problem with the TC/Transmission. Said it's a tire out of balance. The vibration happens when I'm on the gas, mainly between 1200-1400 rpm ( regardless of what gear its in).

Sound like a correct diagnosis by the picoscope?

chozn4service · 05-20-2019, 10:56 AM

That sounds like bull crap to me and I’d take it to another dealership if at all possible. Seems like an out of round or balanced issue tire would almost creat the same vibration or shutter at all times and not specific to gear and speed. My shutter while it only seemed to happen at low speeds, 40-55 MPH, it didn’t happen all the time and only on occasions on the Interstate between 55-65 MPH.
I know since the flash and flush and all seems to be really good and I’m happy! I’m right at 4,612 on the car and it runs really good!

crosive · 05-20-2019, 01:04 PM

Quote:

Originally Posted by classicrockr

Dealer told me today that the picoscope indicated no problem with the TC/Transmission. Said it's a tire out of balance. The vibration happens when I'm on the gas, mainly between 1200-1400 rpm ( regardless of what gear its in).

Sound like a correct diagnosis by the picoscope?

a tire imbalance is usually speed dependent, not rpm dependent.

having said that, I did have some tires (stock ones with ~20k) that were in bad shape due to not being able to rotate them. I had them road force balanced, and one from the front, and back, couldn't be brought within spec. this created a "pulsing" vibration when at speed that felt super close to when I had the beginnings of the shudder, but it happened at speed regardless of gear, acceleration, rpm, etc.

Hasti · 05-20-2019, 04:32 PM

Had mine done in Late Aril put about 2k miles on it. Hasn't reverted. will keep updated

Hasti · 05-20-2019, 04:34 PM

Quote:

Originally Posted by the chosen one

100% agree with your observations. If you drive in manual mode with the paddles or stick you can keep the car from lugging and avoid any shuddering.

on the Camaro? for me it was in any mode it would shudder

HybridWolf69 · 05-25-2019, 03:26 AM

Recently bought this car and within a few days noticed the shudder. Took to dealer and the triple flush (TSB 18-NA-355) was performed but I still notice shudder. Dealer says I need to "drive car for 200 miles to complete repair." Isn't this fix supposed to be instant or can it improve over time? If still exists after 200 miles is torque converter next step? Thanks for any info

Silverado57 · 05-25-2019, 06:11 AM

Quote:

Originally Posted by HybridWolf69

Recently bought this car and within a few days noticed the shudder. Took to dealer and the triple flush (TSB 18-NA-355) was performed but I still notice shudder. Dealer says I need to "drive car for 200 miles to complete repair." Isn't this fix supposed to be instant or can it improve over time? If still exists after 200 miles is torque converter next step? Thanks for any info

I was also told 200 miles, although mine worked immediately and seems to be OK after several hundred miles.

SSport16 · 05-25-2019, 09:59 AM

Mine worked right away, almost 1000 miles after flush/TCM relearn, all is good.

HybridWolf69 · 05-25-2019, 11:13 AM

Expecting to get a new torque converter at this point. Hopefully they won't give me any trouble. Not really sure yet how competent this dealer is

SnakeEyeSS · 05-27-2019, 06:18 PM

Quote:

Originally Posted by HybridWolf69

Recently bought this car and within a few days noticed the shudder. Took to dealer and the triple flush (TSB 18-NA-355) was performed but I still notice shudder. Dealer says I need to "drive car for 200 miles to complete repair." Isn't this fix supposed to be instant or can it improve over time? If still exists after 200 miles is torque converter next step? Thanks for any info

355 isn't the triple flush. So, I'd check to see if they used the correct new fluid because if they used the wrong TSB, that one doesn't specify the new fluid. Triple Flush won't hurt if the used the new fluid though, but you would be the first to not see an immediate improvement with the new fluid. Occam's razor, and hopefully not a bad omen for the rest of us.

SDF62 · 05-27-2019, 06:23 PM

I had the "flush" done on my 16 2SS last week. So far so good! The tranny shifts like never before. The "flush" was taken care of under warranty. I will post if anything changes................

SSport16 · 05-28-2019, 09:31 AM

Mine is still going strong, took a mountain road trip yesterday, about 1200 miles on it since the flush and drove/shifted great yesterday!

05-20-2019, 10:56 AM	#424
chozn4service Drives: 2016 SS w/2SS A8 Blue Velvet Join Date: Dec 2009 Location: 39.793153,-86.238223 Posts: 3,678 View My Garage	That sounds like bull crap to me and I’d take it to another dealership if at all possible. Seems like an out of round or balanced issue tire would almost creat the same vibration or shutter at all times and not specific to gear and speed. My shutter while it only seemed to happen at low speeds, 40-55 MPH, it didn’t happen all the time and only on occasions on the Interstate between 55-65 MPH. I know since the flash and flush and all seems to be really good and I’m happy! I’m right at 4,612 on the car and it runs really good! __________________ Never grow up, it's a trap!

05-25-2019, 09:59 AM	#430
SSport16 Drives: 2016 Garnet Red Camaro 2SS Join Date: Jul 2015 Location: North Carolina Posts: 5,435	Mine worked right away, almost 1000 miles after flush/TCM relearn, all is good. __________________ 2SS Camaro, Garnet Red, Adrenaline Red, NPP, MRC, A8, 5 Split Spoke Bright Silver Wheels (56W) 1100 Status - 7/24/15 (Ordered) 3800 Status - 10/13/15 (Built) 6000 Status - 12/22/15 (Delivered)

05-28-2019, 09:31 AM	#434
SSport16 Drives: 2016 Garnet Red Camaro 2SS Join Date: Jul 2015 Location: North Carolina Posts: 5,435	Mine is still going strong, took a mountain road trip yesterday, about 1200 miles on it since the flush and drove/shifted great yesterday! __________________ 2SS Camaro, Garnet Red, Adrenaline Red, NPP, MRC, A8, 5 Split Spoke Bright Silver Wheels (56W) 1100 Status - 7/24/15 (Ordered) 3800 Status - 10/13/15 (Built) 6000 Status - 12/22/15 (Delivered)

05-20-2019, 09:06 AM	#423
classicrockr Pills are for Pansies Drives: 2023 2SS Red Hot Vert Camaro Join Date: Jul 2008 Location: Citrus Springs FL Posts: 1,296	Dealer told me today that the picoscope indicated no problem with the TC/Transmission. Said it's a tire out of balance. The vibration happens when I'm on the gas, mainly between 1200-1400 rpm ( regardless of what gear its in). Sound like a correct diagnosis by the picoscope?

05-20-2019, 04:32 PM	#426
Hasti Drives: 2017 Hot Red 2ss Auto adrenaline Join Date: Aug 2017 Location: Detroit Posts: 97	Had mine done in Late Aril put about 2k miles on it. Hasn't reverted. will keep updated

05-25-2019, 03:26 AM	#428
HybridWolf69 Drives: 2016 Camaro SS Join Date: May 2019 Location: Texas Posts: 18	Recently bought this car and within a few days noticed the shudder. Took to dealer and the triple flush (TSB 18-NA-355) was performed but I still notice shudder. Dealer says I need to "drive car for 200 miles to complete repair." Isn't this fix supposed to be instant or can it improve over time? If still exists after 200 miles is torque converter next step? Thanks for any info

05-25-2019, 11:13 AM	#431
HybridWolf69 Drives: 2016 Camaro SS Join Date: May 2019 Location: Texas Posts: 18	Expecting to get a new torque converter at this point. Hopefully they won't give me any trouble. Not really sure yet how competent this dealer is

05-27-2019, 06:23 PM	#433
SDF62 Drives: 2016 Garnet Red Camaro 2SS Join Date: Sep 2018 Location: Columbia, Mo. Posts: 175	I had the "flush" done on my 16 2SS last week. So far so good! The tranny shifts like never before. The "flush" was taken care of under warranty. I will post if anything changes................

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