GM Issues Fix For C8 Corvette Transmission Control Module Communication Loss
11-03-2021, 09:37 AM
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GM Issues Fix For C8 Corvette Transmission Control Module Communication Loss
For those who may have missed it: GM Issues Fix For C8 Corvette Transmission Control Module (gmauthority.com)
11-03-2021, 12:02 PM
#2
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For those who may have missed it: GM Issues Fix For C8 Corvette Transmission Control Module (gmauthority.com)
Is this an additional update that recently corrected a DCT communication ?
My latest update is September 25, 2021 (21233696) for a DCT communication loss. (2021 coupe)
As of today, 11/03/2021 no updates available.
Last edited by Mike's LS3; 11-03-2021 at 12:21 PM.
11-03-2021, 12:22 PM
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I get my update at the dealer's next week since I refused the OTA version.
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11-03-2021, 12:52 PM
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I did this OTAU and it went well, it didn't do much to solve my leaking DCT fluid pan though. 
11-03-2021, 03:22 PM
#7
I received this OTA notice Halloween, but the update failed. I then searched for available updates, and there were none. My prior OTA's have gone without a hitch. Nice to see a more complete explanation.
04-08-2024, 10:15 AM
#8
Drifting
I'm resurrecting this old thread to let everyone know I just had this update done by the local Chevy dealer last Thursday. My car is a 2021 built the last week of January 2021. I periodically check for OTA updates and to my knowledge my car has never presented this update. I took my Corvette in for another issue and the recall appeared on the service advisor's computer when the VIN was read.
At any rate, the update has completely changed the behavior of my transmission. Before the update, shifts between first and second gear in manual mode were pretty harsh if the shift didn't occur at exactly the correct RPM. It was rough enough to be rather annoying and something I complained about with the Corvette's DCT. After the update, the shift between between first and second at any RPM is so smooth the only way to tell if it shifted is to look at the gear number on the DIC. All other shifts are equally as smooth. All I can say is what a difference a software update has made to the driveability of my C8.
At any rate, the update has completely changed the behavior of my transmission. Before the update, shifts between first and second gear in manual mode were pretty harsh if the shift didn't occur at exactly the correct RPM. It was rough enough to be rather annoying and something I complained about with the Corvette's DCT. After the update, the shift between between first and second at any RPM is so smooth the only way to tell if it shifted is to look at the gear number on the DIC. All other shifts are equally as smooth. All I can say is what a difference a software update has made to the driveability of my C8.