[zag]

If and when your car develops the shudder, you will notice it. Mine started at 1,200 miles. I had the latest flush done NA-18-355 per TSB. Not to many miles since I had it done, so far so good.

[CoolbreezeNJ]

Just at 10k on my '18 HW 2ss. Haven't felt a thing. I did have the rear end groan they flushed it and it stayed around for maybe another 1K miles and now it is gone.

[T32803]

Originally Posted by CoolbreezeNJ

Just at 10k on my '18 HW 2ss. Haven't felt a thing. I did have the rear end groan they flushed it and it stayed around for maybe another 1K miles and now it is gone.

Did they do a peco test or did they flush the fluid based on your experience only?

[arpad_m]

Originally Posted by Need4Camaro

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.

Early flush + complete trans retune + AFM off before any symptoms. (Fun fact: overall mpg loss was 2.7 without AFM, so it's not an awful tradeoff in terms of fuel economy.)

Yeah, the GM warranty is technically gone, so if anything goes wrong in the TC or the trans, replacements will very likely be on my dime. I have a very good dealership, so they may be willing to help, but that'll be icing on the cake in my mind.

I can't look at the 2019 SS front or rear end without shuddering (pun not intended), even after several months, so this was my only choice, short of waiting for the trans shudder and then trying to get GM to fix it. Then again, the new flush might actually be the solution, we'll see.

[SnakeEyeSS]

Originally Posted by T32803

Did they do a peco test or did they flush the fluid based on your experience only?

Depends on the dealer. They are supposed to do a pico, mine told me they would, but the car only had one or two more miles when I picked it, so they probably didn't.

[wingchunsifu]

Originally Posted by Azerlazer26

Does anybody have a video of what exactly the shudder sounds like?

It's not a sound it's a vibration you will feel in seat of your pants exactly as the TSB describes. Had a flush then 2k later a TC swap and no vibration, runs great. 10k on the car so far.

Custom ECM tune AFM-off plus engine parameters dialed in to up-tune the factory's downed-tune, tune. Zero throttle lag, great performance. Re-flashed the factory tune before authorized warrantee TC swap as per service writer, who is a personal friend stated the re-flashed read was sufficient to authorize repair. Told me if I the TCM was flashed then no Bueno. Apparently the dealer requires both TCM and ECM for big repair jobs. No mention from him about the dreaded "flash counter".

[T32803]

To be more accurate it's a sound AND a vibration. You will definitely hear a resonating
low hum noise that does not sound normal or pleasant. You will also feel a vibration
that feels like the car is shaking erratically.

[GroundhogSS]

I had the latest flush in early February at about 35,700 miles. After 2500 miles, no problems seen yet. It shifts quickly and less noticeable when it down shifts when stopping. Not going to worry about it.