[ItsChristianInHD]

All is good on my end. i have 120 miles since.
Shifts- MUCH MORE Crisp.
V6-V4 switch- Jerky sometimes.
V6 Shudder- Not there.
V4 Shudder- Still slight one when its about to switch from V4 to V6.

[hitmix300]

for those who are out of warranty or want to know what gm part number 19417577 is here you go:

its mobil 1 lv atf hp

https://www.summitracing.com/parts/mob-122210

the dealership sold me a bottle today for 9.02$ out the door.

[Budman51]

Picked my 1SS A8 up this afternoon from the dealer after the flush. Sixty five mile drive home. Shifts are crisper, quicker and feel like a performance auto tranny should feel. Even better than when brand new. Build date 11/17, purchased 2/11/18. Now has 1541 miles, shudder started Nov '18 with about 1180 miles. Shudder was very mild, so I hope I caught it before the tcc was degraded. No shudder now. Yes, I do use the Range device.

[GroundhogSS]

Originally Posted by chris227

I believe so. Mine should be done in the next hour so I'll know more or what was done.

Update.

Dealership replaced the fluid with (19417577) That is the new fluid.
Car runs great, Shifts Smooth, no shudder at all. Will have to wait to see for how long.

I got it done this week. My invoice lists the fluid as part number 19417904. I wonder what the difference is?

[RazzleDazzle]

I called my local dealership and they knew of the problem right away and booked me an appointment right away to do the new Q1 fix! WHEW! If this doesn't fix it, I'm gonna have to get rid of the car :/ It's too nerve racking...

[mgwarlock]

Pickup mine a week ago and probably put in 200 miles with no sign of shudder. The GM customer care person is closing my case but assure me that it can be re-open once it came back.
Cross our finger.

[Biggdummy]

Originally Posted by hitmix300

for those who are out of warranty or want to know what gm part number 19417577 is here you go:

its mobil 1 lv atf hp

https://www.summitracing.com/parts/mob-122210

the dealership sold me a bottle today for 9.02$ out the door.

I thought the new fluid came in bottle with blue label?

[Biggdummy]

http://www.teamzr1.com/ubbthreads/ub...at&Number=4278

[gmw0181]

Had mine in today 2/16/19 for the fix. Seems fine for now. I will upload some of the paperwork.


Reflashed back to stock and even had a CEL for my headers. Told them repair trans only with no problem from dealer.

[drooks73]

2nd visit for shudder and the new tsb didn't change shudder at all. stealership has tried to get a new converter both visits with gm declining converter. 1st time it lasted about 3200 miles then shudder came back. transmission tech and adviser said mine was the worse they have had yet. new tsb is another band aid, 1 more visit in the near future then it's lemon law time for me. done with the band aids!

[bologdl]

Mobil 1 Synthetic LV ATF HP 19417577 I just had TSB Bulletin 18-NA-355 done on my Camaro and now the shutter is gone and hopefully this is the fix. Wondering for future information the schedule maintenance is to flush the A8 Transmission every 45K but can you go longer with the new fluid? Dealership says 100K but do not have anything in writing from GM to prove it. Does anyone else know if the flush cycle has been extended. I'm asking because the cost jumped to just around $500 to flush with Mobil 1 Synthetic LV ATF HP fluid.

[gmw0181]

Well 700 mile so far and all is good. The trans does shift better and just a bit higher shift points. To cold outside to see if my 0-60mph and 0-120mph times have changed.
My DWS06 tires do well in winter but.........salt on road is like butter.

[chozn4service]

Originally Posted by gmw0181

Well 700 mile so far and all is good. The trans does shift better and just a bit higher shift points. To cold outside to see if my 0-60mph and 0-120mph times have changed.
My DWS06 tires do well in winter but.........salt on road is like butter.

Thanks for the info! So let me ask this, how long did it take for your dealership to perform this service? I know my last flush I had to leave the car and came back the next day. Just wondering if this is standard protocol.

[gmw0181]

Originally Posted by chozn4service

Thanks for the info! So let me ask this, how long did it take for your dealership to perform this service? I know my last flush I had to leave the car and came back the next day. Just wondering if this is standard protocol.

I was told the service is three hours. But it took all day.
Dropped off 730 am and told it.will be done by noon. Then they fell behind and I picked it up at 4pm.