[TJay74]

Originally Posted by Lithias

AFM has nothing to do with the transmission shudder.

And yes I know it's slightly different, rated for less horsepower, but they have the same calibration/tune.

In fact, I've never even noticed the so called AFM shudder on my 2019.

Actually the AFM on the A8 is a huge culprit in what is causing the shudder due to the pressure changes the pump and TCM request during AFM transition. My AFM has been turned off since I got my 16 GMC Sierra and I have yet to have any issues with the shudder.

My dealer swapped the fluid for me for free and I will have the update done when it releases later this year.

[Lithias]

Originally Posted by TJay74

Actually the AFM on the A8 is a huge culprit in what is causing the shudder due to the pressure changes the pump and TCM request during AFM transition. My AFM has been turned off since I got my 16 GMC Sierra and I have yet to have any issues with the shudder.

My dealer swapped the fluid for me for free and I will have the update done when it releases later this year.

That's interesting, I wonder if they changed how AFM works for 2019s then, cause I always read about the AFM shuddering but I haven't experienced anything like that except hearing the cylinders shutoff.

[Joshinator99]

Originally Posted by Lithias

Didn't say that, but I'm 2k in and haven't had a single issue or shudder. The 10L80 is just as much a beast as 10L90 in the ZL1, just rated for less horsepower.

The only thing I've noticed with AFM is if I dont have music on I can hear the cylinders turn off, that's it. No shuddering or anything.

It's a different transmission, and not the same as a 10L90. Period. You can't automatically assume the 10L80 will be as good. Could it be? Maybe. Let's talk later when some real time and mileage have accrued. For the sake of the Camaro's future, I do hope you end up being correct.

2K mileage is a laughably low amount of miles to make any determinations. The shudder often didnt appear until the better part of 20K miles on the earlier cars.

[Joshinator99]

Originally Posted by Lithias

That's interesting, I wonder if they changed how AFM works for 2019s then, cause I always read about the AFM shuddering but I haven't experienced anything like that except hearing the cylinders shutoff.

AFM doesn't make it shudder as part of normal operation. You won't feel it when AFM engages. But it causes the trans to eventually shudder once enough damage to the torque converter is done.

[Lithias]

Originally Posted by Joshinator99

It's a different transmission, and not the same as a 10L90. Period. You can't automatically assume the 10L80 will be as good. Could it be? Maybe. Let's talk later when some real time and mileage have accrued. For the sake of the Camaro's future, I do hope you end up being correct.

2K mileage is a laughably low amount of miles to make any determinations. The shudder often didnt appear until the better part of 20K miles on the earlier cars.

Except we already know the 10L80 is a pretty good transmission considering the Mustang has had it for 2 model years now.....granted their calibration caused some issues, but they haven't had anything like the A8 shudder or anything that rendered the car undriveable. It's also been in a few other vehicles if I'm not mistaken.

While it is slightly different than the 10L90, it's likely not much different design wise.....I've driven a ZL1 A10, the 10L80 shifts just as fast as the 10L90......

I'd also like to point out that the AFM is not the sole culprit. Many people also reported that when they zeroed out there slip tables the shudder went away.

[modru2004]

18 2ss a8 started shuddering around 4500 miles. there are some other 18's on here having issues as well. i don't think there IS a break point. because GM doesn't know how to fix the problem. otherwise im pretty sure they would be rolling out fixes for everyone here.

[JaxChris]

Every longitudinal GM since 2015 with either the 8 or 10 speed automatic AND has AFM is vulnerable to the issue. This includes 2019 Camaros with 10L80. For the longest time GM tried acting like it was only the 8L90, but all 8L and 10L models with AFM masking are prone to experience it.

Sadly not all owners go bitching about it unless it breaks down on them. Instead they just think the car is an uncomfortable POS and trade it in for another brand of vehicle. There are a lot of former 6th gen Camaro guys (and 5th gen L99 guys too) now on the Mustang and Challenger forums. Camaro being in 3rd place and falling fast isn't a surprise. Watch how fast Ranger sales outpace and crush Colorado sales. I would even wager that 2019 Silverado/Sierra sales will pale in comparison to K2XX sales and will show much greater declines than F-150 and Ram for at least the next couple years.

GM R&D is making their brands look like they hired the old Chrysler quality control that thought using the same shitty cracking plastic dashboards from a Plymouth minivan was good enough for higher priced cars like Dodge Vipers.

[JaxChris]

And even the flush is just a temporary bandaid to remove the build up of debris in the fluid. After another 4-7k miles the problem is back. 32k miles and 4 flushes for me already.

[Azerlazer26]

Originally Posted by JaxChris

And even the flush is just a temporary bandaid to remove the build up of debris in the fluid. After another 4-7k miles the problem is back. 32k miles and 4 flushes for me already.

I just read on the Colorado ZR2 forums that there is a new fix on the way by this March. Hopefully, this will be the fix that officially repairs every 8L90 transmission out *fingers crossed*

[Lithias]

Originally Posted by JaxChris

Every longitudinal GM since 2015 with either the 8 or 10 speed automatic AND has AFM is vulnerable to the issue. This includes 2019 Camaros with 10L80. For the longest time GM tried acting like it was only the 8L90, but all 8L and 10L models with AFM masking are prone to experience it.

Sadly not all owners go bitching about it unless it breaks down on them. Instead they just think the car is an uncomfortable POS and trade it in for another brand of vehicle. There are a lot of former 6th gen Camaro guys (and 5th gen L99 guys too) now on the Mustang and Challenger forums. Camaro being in 3rd place and falling fast isn't a surprise. Watch how fast Ranger sales outpace and crush Colorado sales. I would even wager that 2019 Silverado/Sierra sales will pale in comparison to K2XX sales and will show much greater declines than F-150 and Ram for at least the next couple years.

GM R&D is making their brands look like they hired the old Chrysler quality control that thought using the same shitty cracking plastic dashboards from a Plymouth minivan was good enough for higher priced cars like Dodge Vipers.

The 10 speed is NOT affected by the shudder (as of yet). There have been 0 reported issues of it on any cars that have it, trust me I've looked pretty diligently.

Like I said, Ford has been using it for a few model years now on several vehicles, and the beefier version has been a beast in the ZL1.

[ste1n]

I ordered a range AFM disabler for my 19 A10. I just want to be safe and don't want to take a chance.

[slowclimb]

Does anyone know the percentage of vehicles with the A8 sold that have been impacted by this issue or reported? Is that published anywhere?

[Azerlazer26]

Originally Posted by slowclimb

Does anyone know the percentage of vehicles with the A8 sold that have been impacted by this issue or reported? Is that published anywhere?

+1

[dmcmahan60]

Originally Posted by ste1n

I ordered a range AFM disabler for my 19 A10. I just want to be safe and don't want to take a chance.

I just removed the Range because it was worse then the shudder itself. I had the flush done at 22k now I am at 27k. Even with the V4 mode disabled the Torque Convertor was going in and out of lockup. That is why I took off the Range AFM.