Triple Flush
I was talking to a tech that works at the local Chevy dealer as I sold him some of my old Camaro tires. He does a lot of the transmission work at this dealership- and was very familiar with the A8 issues. He mentioned that Mobil just released a new friction modifier package for their fluid - and he felt this was the real fix. His contention was that even using the Range Disabler, the way the transmission is programmed to shift (which is biased by gas mileage goals) it still causes the TC to go in and out of lockup. He said the new fluid's modifier was supposed to prevent TC damage from this. He advised me to be proactive and get the triple flush done now with the new fluid. He also told me that you have to check the date on the fluid to know if it has the new package or not. I asked if I'd be covered under warranty if I stated I had shudder issues when I walked in. His response was that unless he saw the shudder via some type of scanner - the warranty work wouldn't be authorized. That being said - being proactive would be 100% on me. I've done nothing with this - but I haven't heard of this change in the friction modifier package. He also said that his dealership is either still replacing - or back to replacing the TC when a customer comes in with confirmed shudder. No more triple flush.
Anyone else hear anything similar?
I do kinda wish I'd stuck to my guns and just waited until I found an M7, especially after constantly reading about all of these A8 issues.
Last edited by Sconn; Sep 20, 2018 at 09:49 AM.
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I was talking to a tech that works at the local Chevy dealer as I sold him some of my old Camaro tires. He does a lot of the transmission work at this dealership- and was very familiar with the A8 issues. He mentioned that Mobil just released a new friction modifier package for their fluid - and he felt this was the real fix.
His contention was that even using the Range Disabler, the way the transmission is programmed to shift (which is biased by gas mileage goals) it still causes the TC to go in and out of lockup.
He said the new fluid's modifier was supposed to prevent TC damage from this. He advised me to be proactive and get the triple flush done now with the new fluid. He also told me that you have to check the date on the fluid to know if it has the new package or not. I asked if I'd be covered under warranty if I stated I had shudder issues when I walked in. His response was that unless he saw the shudder via some type of scanner - the warranty work wouldn't be authorized. That being said - being proactive would be 100% on me. I've done nothing with this - but I haven't heard of this change in the friction modifier package. He also said that his dealership is either still replacing - or back to replacing the TC when a customer comes in with confirmed shudder. No more triple flush.
Anyone else hear anything similar?
My 2016 w/Z51 A8 has had a slight shudder since new and I used a Range for about 300-400 miles when new.
After that I didn't use the Range anymore because it didn't seem to make any difference between using it and not using it.
Now with over 17,000 miles on the clock I just drive it, and it has a slight shudder in both Auto or Manual mode.
Sometimes the shudder is more noticeable than other times but 85-90 % of the time it's hardly noticeable.
It's more noticeable cruising steady on the highway, otherwise it's doesn't seem to be an issue.
Earlier this Summer I brought it to my Dealer to see about getting the Flush, and had the Tech drive it with me in the car and he didn't feel it was needed.
Of course it was a real hot day and the shudder is almost none existed in that type of weather.
The Tech did say if I wanted it Flushed, they would do it if I decided to have it done at a later date no problem.
He has done quite a few and also said they only do the Single Flush now with the updated Fluid..
On another note: I went to another Dealer closer to me that usually only has 1 Corvette in their showroom at any given time to see if they had any experience with doing the Flush.
The Service manager said they have Not done any Corvettes but had done a lot of the Colorado's.
I have a month left on the Factory 36 month Drive train warranty and told him I also have the Major Guard extended warranty.
And that's when he told me the Flush would only be covered under the Factory 36 month Drive train warranty

IMO, that remains to be true or false depending on the Dealer, and will be doing more research on that before it's too late.
Just my 2 cents for what it's worth from my experience and research
My 2016 w/Z51 A8 has had a slight shudder since new and I used a Range for about 300-400 miles when new.
After that I didn't use the Range anymore because it didn't seem to make any difference between using it and not using it.
Now with over 17,000 miles on the clock I just drive it, and it has a slight shudder in both Auto or Manual mode.
Sometimes the shudder is more noticeable than other times but 85-90 % of the time it's hardly noticeable.
It's more noticeable cruising steady on the highway, otherwise it's doesn't seem to be an issue.
Earlier this Summer I brought it to my Dealer to see about getting the Flush, and had the Tech drive it with me in the car and he didn't feel it was needed.
Of course it was a real hot day and the shudder is almost none existed in that type of weather.
The Tech did say if I wanted it Flushed, they would do it if I decided to have it done at a later date no problem.
He has done quite a few and also said they only do the Single Flush now with the updated Fluid..
On another note: I went to another Dealer closer to me that usually only has 1 Corvette in their showroom at any given time to see if they had any experience with doing the Flush.
The Service manager said they have Not done any Corvettes but had done a lot of the Colorado's.
I have a month left on the Factory 36 month Drive train warranty and told him I also have the Major Guard extended warranty.
And that's when he told me the Flush would only be covered under the Factory 36 month Drive train warranty

IMO, that remains to be true or false depending on the Dealer, and will be doing more research on that before it's too late.
Just my 2 cents for what it's worth from my experience and research






My 2016 w/Z51 A8 has had a slight shudder since new and I used a Range for about 300-400 miles when new.
After that I didn't use the Range anymore because it didn't seem to make any difference between using it and not using it.
Now with over 17,000 miles on the clock I just drive it, and it has a slight shudder in both Auto or Manual mode.
Sometimes the shudder is more noticeable than other times but 85-90 % of the time it's hardly noticeable.
It's more noticeable cruising steady on the highway, otherwise it's doesn't seem to be an issue.
Earlier this Summer I brought it to my Dealer to see about getting the Flush, and had the Tech drive it with me in the car and he didn't feel it was needed.
Of course it was a real hot day and the shudder is almost none existed in that type of weather.
The Tech did say if I wanted it Flushed, they would do it if I decided to have it done at a later date no problem.
He has done quite a few and also said they only do the Single Flush now with the updated Fluid..
On another note: I went to another Dealer closer to me that usually only has 1 Corvette in their showroom at any given time to see if they had any experience with doing the Flush.
The Service manager said they have Not done any Corvettes but had done a lot of the Colorado's.
I have a month left on the Factory 36 month Drive train warranty and told him I also have the Major Guard extended warranty.
And that's when he told me the Flush would only be covered under the Factory 36 month Drive train warranty

IMO, that remains to be true or false depending on the Dealer, and will be doing more research on that before it's too late.
Just my 2 cents for what it's worth from my experience and research

1) a tech will hook up his computer to your car and while doing a road test will measure Torque Converter Clutch slip and other parameters to confirm they are either in or out of tolerance.,
2) If out of tolerance they will do the flush procedure or go straight to a TC replacement which includes the new transmission fluid that became available very late 2016 or Jan 2017.
I see that you are probably in Florida for the winter as am I . Stingray Chevrolet in Plant City FL is one of the nations largest Corvette dealers. You can call them for verification of your concerns and warranty by speaking with Justin Lawson who is the Director of Maintenance and has a great deal of experience with these issues.For TC issues , differential issues etc, I would STRONGLY recommend you only deal with a large Corvette dealership.
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1) a tech will hook up his computer to your car and while doing a road test will measure Torque Converter Clutch slip and other parameters to confirm they are either in or out of tolerance.,
2) If out of tolerance they will do the flush procedure or go straight to a TC replacement which includes the new transmission fluid that became available very late 2016 or Jan 2017.
I see that you are probably in Florida for the winter as am I . Stingray Chevrolet in Plant City FL is one of the nations largest Corvette dealers. You can call them for verification of your concerns and warranty by speaking with Justin Lawson who is the Director of Maintenance and has a great deal of experience with these issues.For TC issues , differential issues etc, I would STRONGLY recommend you only deal with a large Corvette dealership.
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I thought so, but wasn't going to argue with the Dealer that said it wasn't covered.
Only reason I talked with them is because they're just a couple miles away.
I live 20 miles from MacMulkin where I bought the 2016 and that's where I had the Tech test drive it.
I'll be going to MacMulkin
Last edited by Dif; Sep 20, 2018 at 04:59 PM.
Mine was done at 45K miles earlier this year by my dealership. I just bought ten quarts of Mobil 1 LV ATF HP and an OEM AT filter kit from my local Chevy dealership.
132.00 was the cost.
I will do a video while I change the fluid and filter at 60K miles.
What I find with the Range is the car still shakes in traffic driving.
Even in constant V8 mode sometimes the car just doesn't know which gear to be in 5-6-5-6-4-5-6-5 consistently. Very annoying.
Open highway, rides like a dream.
I am hoping changing the fluid every 15K will smooth some things out. The guys at my dealer knew nothing about any additive. There was an additive for the A6 rear differential. Not the same stuff though.
If you are looking for ATF - Summit Racing is the cheapest at 11.99 free shipping.https://www.summitracing.com/parts/m...xoCrmkQAvD_BwE
My dealership beat that price including taxes.
They use a vibration sensor attached to the rear bolt of the drivers seat.
The software can tell if the vibration is engine, transmission or tire/wheel harmonic.
Minimal shudder is not going to be addressed under warranty.
















