8l90 in a c6
Burning Brakes
Joined: Jun 2022
Posts: 750
Likes: 255
From: Florida
I don't know if the factory PCM can be programmed to understand the exta 2 gears. On top of that GM had problems with the 8 speed and I'm sure there much be a size difference?
Le Mans Master
Joined: Dec 2013
Posts: 6,338
Likes: 5,115
From: Charles Town WV
2024 Corvette of the Year Finalist - Modified
2023 C6 of the Year Winner - Modified
2022 C6 of the Year Finalist - Modified
So where as I can't verify if they got it working or not yet I can confirm a shop local to me is in the process of trying it. Cutaway Creations in Summit Point WV
Safety Car
Joined: Apr 2007
Posts: 4,461
Likes: 326
From: Houston TX
You would think there is a large size difference, but there is not. The front mount is the same, the rear mount is the same, and the overall length of the transmission is the same. The 8L90 has a deeper pan, and the top of the 6L80 actually protrudes a bit more outward.
Instructor
Joined: Jun 2011
Posts: 215
Likes: 14
From: Mansfield Texas
St. Jude Donor '13
This is interesting. Update this post if you hear anything new about this. We don't get a lot of effort from the aftermarket companies on major mods like this for our "dead" C6 platform. Subscribed
Le Mans Master
Joined: Dec 2013
Posts: 6,338
Likes: 5,115
From: Charles Town WV
2024 Corvette of the Year Finalist - Modified
2023 C6 of the Year Winner - Modified
2022 C6 of the Year Finalist - Modified
Will do, o question why anyone would tho being the 6l80 is a tough unit and the 8l90 has had its issues
