Transmission issues 2020 C8
What’s Next
Joined: Dec 2020
Posts: 1,293
Likes: 834
From: Reality
That crossed my mind also last night. When mine is delivered I’m going to have that done before I leave. They need to check the sight bolt on the side and make sure that’s level then put the extra 2 quarts. Just a piece of mind while using break in procedures. Knowing my self I’ll change all fluids well before the recommended intervals.
Melting Slicks
Joined: Feb 2020
Posts: 2,073
Likes: 1,306
From: Midwest
Oh Oh my new Coupe is doing the same thing as well. It’s fine on the road but when driving slow like through a parking lot it really jerks and bucks. I was told it has to go through a learning cycle and may have to be re programmed. I also threw an engine code at 250 miles on the clock said it was a drive train issue.
Burning Brakes
Joined: Sep 2019
Posts: 1,089
Likes: 668
From: Orange County, CA
[QUOTE=sdemetri;1602823462]Finally got my car back from Delillo Chevy in Huntington Beach. Car had 60 miles more on it and was filthy. I guess the good news is the transmission works..... for now[/QUOTE
Did you really want the dealer to wash your car? I think they did you a favor. I explicitly instructed them not to wash the car when it came off the delivery truck.
Did you really want the dealer to wash your car? I think they did you a favor. I explicitly instructed them not to wash the car when it came off the delivery truck.
Thread Starter
Cruising
Joined: Dec 2020
Posts: 11
Likes: 20
From: Newport beach
[QUOTE=GTUnit;1602826440]
at least not leave grease on the seat??? is that too much
Finally got my car back from Delillo Chevy in Huntington Beach. Car had 60 miles more on it and was filthy. I guess the good news is the transmission works..... for now[/QUOTE
Did you really want the dealer to wash your car? I think they did you a favor. I explicitly instructed them not to wash the car when it came off the delivery truck.
Did you really want the dealer to wash your car? I think they did you a favor. I explicitly instructed them not to wash the car when it came off the delivery truck.
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Joined: Oct 2000
Posts: 14,064
Likes: 1,166
From: N. Alabama
Drifting
Joined: Jan 2014
Posts: 1,285
Likes: 164
From: MA
same
learned lesson on 07 silverado & paying attention to gen2 raptors made me avoid the 2017/early 2018 models- in a new 2020 raptor now after owning a late 2018 for 40k miles & can tell how much they tackled the little issues from beginning to end of production cycle
never, ever, ever ever be the guinea pig for a new niche/hobby/luxury/expensive type vehicle unless you’re just dumb w/ $$$ & wasted time & like burning both of em, or maybe unless you’re into S&M
Melting Slicks
Joined: Feb 2006
Posts: 2,172
Likes: 104
From: Des Moines Iowa
Just took delivery of my Rapid Blue C8 last Thursday, 6 miles. I drove it to my house 2 miles and the shifting was BAD! CEL came on, took it to the local dealer and they confirmed the code, reset, drove around their lot and it threw the same code. Now with 8 miles the car is at the dealer. I am told GM has determine the DCT needs to be replace. No firm date but should expect 3-4 weeks. Not a good start to my mid engine experience.
Instructor
Joined: Oct 2020
Posts: 209
Likes: 43
7th Gear
Joined: Aug 2021
Posts: 7
Likes: 2
From: Newport Beach, CA
C8 Transmission Replacement at 765 Miles
Seems I have a neighbor in Newport Beach with the same problem. I experienced some "hunting" with the trans on my new C8 convertible. Not bad at all. I looked it up, and was convinced that it was just part of the engine and trans "learning" process. But then I got an email and iPhone message that a serious problem was detected with either the engine or transmission, and to bring it in immediately. The dealer told me that he's had 8 or 9 now with this same problem. He further said that often the problem was fixed with reprogramming that cannot be done over the air. I also had a leak with the front lift system, which he said there was a recall for. And also said there was a recall for the infotainment system, with which I've had a lot of funnies. SD card not installed message, no nav. Then after an update, all was well with the nav, but on startup a different XM from when it was shut down plays. Long story not so short, the dealer called yesterday and said the transmission displayed 4 different fault codes, and GM said to replace it. It will take 2-3 weeks for shipping then 2-3 days to install. I waited a year and a half from the time I ordered it. And in 6 months have only driven it 765 miles.
7th Gear
Joined: Aug 2021
Posts: 7
Likes: 2
From: Newport Beach, CA
Advanced
Joined: Apr 2015
Posts: 65
Likes: 6
From: Lake Jackson TX
Just saw the most recent postings. I am the owner who started this tread on the failed DCT on my 2020 Rapid Blue coupe at 8 miles. GM replaced the DCT, and we added the 2 additional quarts of fluid. That was January, and the car has run flawless since, now 4400 miles. It has all worked out but it did take over a month to get it all taken care of.
7th Gear
Joined: Aug 2021
Posts: 7
Likes: 2
From: Newport Beach, CA
Just saw the most recent postings. I am the owner who started this tread on the failed DCT on my 2020 Rapid Blue coupe at 8 miles. GM replaced the DCT, and we added the 2 additional quarts of fluid. That was January, and the car has run flawless since, now 4400 miles. It has all worked out but it did take over a month to get it all taken care of.
Best Regards,
Jeff