Had the Triple Flush done to my 5,800mi A8....Everyone Pre '18 should NOT WAIT
10-24-2018, 03:05 PM
#41
Team Owner
I don't drive the car much.. but when i do have the chance i am usually cruising somewhere around 75 80mph..
When my car was new on maybe 2 or 3 occasions i felt a vibration that shook the whole car at maybe 35 40mph getting back on the throttle at barely 20 30% (it was probably in 6th, in drive).. but on the Parkway, a smooth flat road, i would feel rumble strips ever so slightly now and again...
I chalked it up to my imagination as i've read DOZENS of threads regarding that exact feeling and everyone swearing that Z06's aren't affected by this issue (often)... Well, fast forward to Carlisle 2018.. on the way up about 150mi i noticed a shudder on the hwy in 7th and 8th in drive and from coasting to light throttle at that speed. I also noticed a little "bump" if you will in that same throttle/speed scenario.. i knew something was up... So when i got back i made the appointment to have the Targa Top weatherstrip replaced with the updated version per the TSB, the SC belt also per the TSB and asked for the flush..
I even went as far as to tell my dealer (who i trust with my vette as the Manager owns one and so does my vette tech who races his and is a long time member here but not active much) that if it needs the converter go ahead is what it is... My tech told me he has done dozens of trucks but on the vettes which have been several, the triple flush has done the trick. Last time i was there he had an 8spd taken apart and was rebuilding it (one guy i would take his rebuild over a factory reman any day) and he was telling me about the change in the fluid from the original to the "LV" low viscosity...
Also i had the volume compensator replaced (a little speaker grille in the driver's door panel near shoulder level) replaced as it was vibrating up a storm with even light radio volume when a bass note hit..
So i picked the car up today from the rear remote bay where nobody goes (i love this place) and everything was done perfectly.. radio noise ? GONE... weatherstrips? PERFECT...
Trans flush? driving down the road from the dealer it was almost as much of a difference as having my mag ride updated... the highway? like a DIFFERENT CAR when cruising...
Anyone who has one of these cars pre the new fluid change at the factory NEEDS TO HAVE THIS DONE as a precaution.... i implore you to not wait... I am hoping i got to mine before it did any damage to the converter but who knows.. i wish i didn't have my head in the sand... should've done it a while ago...
REMEMBER ---- IT'S THE FLUID THAT CHANGED... get the old fluid out asap...
PS.. had my 2016 Sierra 8spd Torque Converter replaced 2 weeks ago for the shudder at 25k miles.. that truck was a mess... the TCC would lock at 30mph and lug along like a manual in too tall of a gear then bang.. no flush for that one.. they pulled it and replaced it.. it was gone.
just thought i'd share my experience and i hope to save some members heartache down the road.. the Z06 is in 4cyl mode much less than the LT1 cars.. it takes longer to become noticeable so don't wait....
When my car was new on maybe 2 or 3 occasions i felt a vibration that shook the whole car at maybe 35 40mph getting back on the throttle at barely 20 30% (it was probably in 6th, in drive).. but on the Parkway, a smooth flat road, i would feel rumble strips ever so slightly now and again...
I chalked it up to my imagination as i've read DOZENS of threads regarding that exact feeling and everyone swearing that Z06's aren't affected by this issue (often)... Well, fast forward to Carlisle 2018.. on the way up about 150mi i noticed a shudder on the hwy in 7th and 8th in drive and from coasting to light throttle at that speed. I also noticed a little "bump" if you will in that same throttle/speed scenario.. i knew something was up... So when i got back i made the appointment to have the Targa Top weatherstrip replaced with the updated version per the TSB, the SC belt also per the TSB and asked for the flush..
I even went as far as to tell my dealer (who i trust with my vette as the Manager owns one and so does my vette tech who races his and is a long time member here but not active much) that if it needs the converter go ahead is what it is... My tech told me he has done dozens of trucks but on the vettes which have been several, the triple flush has done the trick. Last time i was there he had an 8spd taken apart and was rebuilding it (one guy i would take his rebuild over a factory reman any day) and he was telling me about the change in the fluid from the original to the "LV" low viscosity...
Also i had the volume compensator replaced (a little speaker grille in the driver's door panel near shoulder level) replaced as it was vibrating up a storm with even light radio volume when a bass note hit..
So i picked the car up today from the rear remote bay where nobody goes (i love this place) and everything was done perfectly.. radio noise ? GONE... weatherstrips? PERFECT...
Trans flush? driving down the road from the dealer it was almost as much of a difference as having my mag ride updated... the highway? like a DIFFERENT CAR when cruising...
Anyone who has one of these cars pre the new fluid change at the factory NEEDS TO HAVE THIS DONE as a precaution.... i implore you to not wait... I am hoping i got to mine before it did any damage to the converter but who knows.. i wish i didn't have my head in the sand... should've done it a while ago...
REMEMBER ---- IT'S THE FLUID THAT CHANGED... get the old fluid out asap...
PS.. had my 2016 Sierra 8spd Torque Converter replaced 2 weeks ago for the shudder at 25k miles.. that truck was a mess... the TCC would lock at 30mph and lug along like a manual in too tall of a gear then bang.. no flush for that one.. they pulled it and replaced it.. it was gone.
just thought i'd share my experience and i hope to save some members heartache down the road.. the Z06 is in 4cyl mode much less than the LT1 cars.. it takes longer to become noticeable so don't wait....
Thanks OP! Car shifts amazing!
10-24-2018, 03:10 PM
#42
Team Owner
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Ron_Attleboro_MA (11-27-2018)
10-24-2018, 04:38 PM
#43
Racer
Trying to get this done on my 2015 z06. Dealer quoted me $408 without a filter change and $526 with a filter change! Don Mccue Chevy in Saint Charles.
Seems awfully steep!
Seems awfully steep!
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Ron_Attleboro_MA (11-27-2018)
10-24-2018, 06:16 PM
#44
Race Director
Thread Starter
Glad you guys made out well. The triple flush pre new fluid is the move.. it's a have to get done. The difference in shifting and driving is very noticeable not placebo. Everything works better with that LV fluid.
10-24-2018, 06:34 PM
#45
Instructor
Got mine scheduled for tomorrow. Anything else I need to have them look at? My car is giving me the "rumble strip" feeling at 60 mph in 8th gear. I'm near the end of my powertrain warranty, so wondering if I need to push for anything else to be looked at.
10-24-2018, 07:30 PM
#46
dealer did mine.no notice in shifting,but it could not hurt to have it d ne if it saves the tq down the road.
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Ron_Attleboro_MA (11-27-2018)
10-24-2018, 10:00 PM
#47
Instructor
GM is scheduled to release a “permanent” fix in early 2019. So you’ll want to document that you’ve been having this problem before your powertrain warranty expired. Or buy HP Tuners, zero your TCM slip tables, install a Circle D or FTI converter, and be done with it.
10-25-2018, 08:22 PM
#48
Le Mans Master
Here is the full TSB ...#16-NA-175: Shake and/or Shudder During Light Throttle Acceleration Between 25
and 80 MPH (40 and 128 KM/H) at a Steady State - (Aug 24, 2017)
Good luck... GUSTO
and 80 MPH (40 and 128 KM/H) at a Steady State - (Aug 24, 2017)
Good luck... GUSTO
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Indy Jim (12-14-2018)
10-25-2018, 09:34 PM
#49
Instructor
That permanent fix has to include TCM reprogramming IMO.
Last edited by Joshinator99; 10-25-2018 at 09:35 PM.
10-25-2018, 09:43 PM
#50
Instructor
They flushed mine and replaced the fluid. They also changed a valve body, and reprogrammed the computer for some new software update. They only charged me for the software update. Out the door for $56.
11-27-2018, 10:03 AM
#53
Le Mans Master
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Ron_Attleboro_MA (11-27-2018)
