Joining the DCT problem club - replacement required/confirmed
 

Late 2023 with 4700 miles delivered Sept 2023

Two nights ago I pulled into the garage the car acted like it was going to stall. Creeping forward was jerky and abrupt. The next day I noticed a vibration (almost like riding over a rumble strip) on upshifts. Starting from a stop or creeping forward felt like it did when I pulled into the garage the night before. Overall, most shifts have gotten very jerky and not smooth.

There are no error messages or CEL, I have not scanned for codes. I contacted my dealer and will get it in next week.

I did watch a video from Brink of Speed where he had the exact same problem and and ECM flash and "global reset" fixed it. I have some hope but I also (obviously) follow the various threads here and know it's not usually that simple.

Sure hope it actually is that simple. Having problems with such low mileage is a real PITA.

I brought it in on 15 April, Tax Day. So far, no word but fingers crossed it's as simple as the attached video.

keep us posted. Good luck man

Day 3 and they haven't done the programming?

Still nothing. In fairness, despite my appointment, they did tell me it would take a couple of days.

Did you get the C8 new or used?
was the DCT broken in correctly as per manual?

Brand new NCM delivery and yes, I broke it in correctly.

UPDATE: The car has been at the dealer for two and a half weeks. They've run diags as Chevy has called out and are waiting for GM to tell them what's next. The service advisor mentioned having to use a borescope. Why would that be needed for a jerky DCT? I'm trying to figure out what path they're going down with that.

It allows them to see if there is any debris and/or scoring without fully disassembling.

I heard from the Service Manager and they have completed their analysis per GM's requirements and have sent the results off to GM for a determination on next steps. They told me it needs a new transmission. :cuss

I have a late 23 also……I’m thinking we may be the ones that are in the latest recall trans replacement.
they say late 23/24.
you mind letting me know last 5 of your vin??

40829

That's my thought, too. GM's recall tracker shows nothing, I'm not sure why it takes so long for GM to generate a VIN range. Why bother announcing it if you can't tell dealers whether a car "qualifies"?

Mine's September 2023 as well with a VIN 4088X but I only have 1,600 miles so far. So far, so good on my car.

This is scary though! :eek:

I've been saying that since the recall was announced. Makes sense that it's the late 23s /24s that got the new DCT with increased baffling.

While I wait around and another Cars and Coffee passes with no car, I decided to open a case with Chevy. I contacted Corvette Concierge to do this after looking having no luck determining how to open a ticket with the "Executive" resolution team mentioned in other threads. I don't really know if this will do anything but it won't hurt.

My fear has come upon me...... :nonod:

https://www.corvetteforum.com/forums...post1607782659

So Steve when you say bought in September is that build month?
so what was build month? Thx man

I reached them by emailing Mary Barra re: my experience. Her email is mary.barra@gm.com

From what I learned, they are a slightly-elevated call center group, so temper your expectations.

Hang in there, and stay on them!

Just checked...build date is August 2023. Puchased early September 2023 as dealer stock.