DCT Transmissions still problematic?
Racer
Joined: Nov 2021
Posts: 362
Likes: 175
From: Plano TX
So I started one Thread about engine and transmission shudder and then added comments to another one regarding the same concerns. It might not be your transmission that is having the problem. There is a service bulletin for the camshaft actuator magnet. It is for all 2014 through 2025 C8s, LT1 & LT2 6.2 L engines. It is really for any of those Motors including those in cars and trucks.
22-NA-080 is the Bulletin. I will try to attach it here. The original bulletin came out in April 2022. An update, to take the service notice through the 2025 yeat models, just came out on September 5, 2025.
They can run a test and if it is out of balance by more than 3°, it has to be replaced. My car was shuddering and jumping badly in low gears especially when cold started. Once it warmed up, you didn't feel it as much. However, it was still there. They tested mine and it was way out of balance. Guess what? The entire motor has to be dropped and multiple components have to be removed so they can get into the interior of the motor and replace the stupid magnet! Mine is scheduled for the week September 29th.
Not happy at all, but mine is covered under warranty and I would think most would be covered under warranty considering it's part of the drivetrain. My main concern is the motor and all the components being put back properly, in a good working order, and I don't have any residual side effects or problems from any type of negligent or poor service.
Sigh.....
22-NA-080 is the Bulletin. I will try to attach it here. The original bulletin came out in April 2022. An update, to take the service notice through the 2025 yeat models, just came out on September 5, 2025.
They can run a test and if it is out of balance by more than 3°, it has to be replaced. My car was shuddering and jumping badly in low gears especially when cold started. Once it warmed up, you didn't feel it as much. However, it was still there. They tested mine and it was way out of balance. Guess what? The entire motor has to be dropped and multiple components have to be removed so they can get into the interior of the motor and replace the stupid magnet! Mine is scheduled for the week September 29th.
Not happy at all, but mine is covered under warranty and I would think most would be covered under warranty considering it's part of the drivetrain. My main concern is the motor and all the components being put back properly, in a good working order, and I don't have any residual side effects or problems from any type of negligent or poor service.
Sigh.....
Melting Slicks
Joined: Aug 2000
Posts: 2,431
Likes: 1,203
From: Early 2020 Z51 Coupe, Original Owner, Ahwatukee Foothills, AZ
I became so frustrated with my 2024 C8's noisy transmission, that I traded it in on a 2025. Thought it would end the irritation. Wrong! This car does other weird things like dropping out of gear momentarily while you're at a stop, and jerking back in. No trouble lights, haven't gone to dealer over this (yet). I. guess I'm hoping the filter change/oil change might affect this for the better. Getting close to being over this whole C8 thing.
Frequently called "User Error". JK
Instructor
Joined: Nov 2017
Posts: 181
Likes: 104
The TR9080 is also used in the Maserati MC20.
Racer
Joined: Dec 2010
Posts: 251
Likes: 36
From: Jefferson Ohio
The dealer will look at the car Wednesday.
