Triple Flush
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7th Gear
Joined: Mar 2026
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From: South Florida
Triple Flush
Just picked up a 2019 Stingray manufactured in Jan 2019 with 26k on the clock. According to what I've read, this means it should have the triple flush on the transmission. I haven't noticed a shudder and have installed an AFM disabler. It is out of warranty. Should I still have the triple flush done? I contacted the local dealer who serviced the car by the PO and verified no triple flush was done.
Thanks in advance,
Brian
Thanks in advance,
Brian
Thread Starter
7th Gear
Joined: Mar 2026
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From: South Florida
Melting Slicks
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https://static.nhtsa.gov/odi/tsbs/20...63890-9999.pdf
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The date of manufacture on the transmission needs to be February 2019 for it to have the new, upgraded fluid. Ask the dealer to run a complete VIS report to verify if the triple flush has been done or not. If not, bite the bullet and have it done.
Intermediate
Joined: Oct 2016
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I stand corrected.' built after Feb 1',( thanks Chris 911,and duckvett), check your build date.
Last edited by sgrant; Mar 23, 2026 at 07:39 PM.
Melting Slicks
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St. Jude Donor '25
You *might* not need it, but at this juncture, still a good measure to drop the pan, change filter, and re-fill.
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Le Mans Master
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Yep, regardless, I would change the fluid. You never know what kind of monkey juice someone else put in your car. My, new to me, 2014 I changed all the fluids to current, required OEM GM fluids. Just be sure you are not the one that uses some odd fluids.
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7th Gear
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From: South Florida
according to what I’m reading
“GM updated the C7 Corvette transmission fluid to a new formulation (Mobil 1 Synthetic ATF for the 8-speed automatic transmission around February or March 2019 to address the torque converter "shudder" issue. While earlier 2019 models still used the old fluid, vehicles produced after this timeframe were filled with the new, improved fluid at the factory.”
mine has a mfg date of 01/19.
“GM updated the C7 Corvette transmission fluid to a new formulation (Mobil 1 Synthetic ATF for the 8-speed automatic transmission around February or March 2019 to address the torque converter "shudder" issue. While earlier 2019 models still used the old fluid, vehicles produced after this timeframe were filled with the new, improved fluid at the factory.”
mine has a mfg date of 01/19.
Melting Slicks
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St. Jude Donor '25
according to what I’m reading
“GM updated the C7 Corvette transmission fluid to a new formulation (Mobil 1 Synthetic ATF for the 8-speed automatic transmission around February or March 2019 to address the torque converter "shudder" issue. While earlier 2019 models still used the old fluid, vehicles produced after this timeframe were filled with the new, improved fluid at the factory.”
mine has a mfg date of 01/19.
“GM updated the C7 Corvette transmission fluid to a new formulation (Mobil 1 Synthetic ATF for the 8-speed automatic transmission around February or March 2019 to address the torque converter "shudder" issue. While earlier 2019 models still used the old fluid, vehicles produced after this timeframe were filled with the new, improved fluid at the factory.”
mine has a mfg date of 01/19.
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Exactly. If the car was built in January 2019, and no triple flush has been done, then yes, you need to have it done.
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according to what I’m reading
“GM updated the C7 Corvette transmission fluid to a new formulation (Mobil 1 Synthetic ATF for the 8-speed automatic transmission around February or March 2019 to address the torque converter "shudder" issue. While earlier 2019 models still used the old fluid, vehicles produced after this timeframe were filled with the new, improved fluid at the factory.”
mine has a mfg date of 01/19.
“GM updated the C7 Corvette transmission fluid to a new formulation (Mobil 1 Synthetic ATF for the 8-speed automatic transmission around February or March 2019 to address the torque converter "shudder" issue. While earlier 2019 models still used the old fluid, vehicles produced after this timeframe were filled with the new, improved fluid at the factory.”
mine has a mfg date of 01/19.
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I would seriously think about getting the GM Platinum Extended Warranty, and see if they would give you a serious discount on the Triple Tranny Flush. Check out a few dealerships to see if you get a bite. 
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Ask your dealer for a GMVIS report which will tell you whether the flush was done or not before you spend $1,000
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The VIS report will show any services that were performed by any GM dealer
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If you are not having the shutter issue there is no need to spend the money and as far as warranty is concerned most dealers do not apply it for the triple flush because it was not a recall, simply a tech bulletin. Not ever A8 had the issue.
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To some degree, yes, but all of the fluids should be changed irregardless. Depends on time/mileage.