The subject of statistics may be subjective given the many ways data is gathered, curated and interpreted but the math behind it, is not. If somebody didn’t know anything about our cars and they would just read this topic which problem do you think would come up as the number one issue? Please use your definition of “objectivity” to arrive at your …subjective conclusion! 🤣

 

You are correct. Someone reading this forum would notice the DCT issues because owners come here to post them. The math, if it could possibly be done based on DCT failures vs total cars produced, would not support that assumption.

 

That may very well be or not be the case. Even if the math is possible (total C8 DCT failures/total C8s) and whether that number is 99% or 1%, it doesn’t really give you the relative delta between the DCT failures and other failures. So, as an example, let’s assume the DCT failures are 1% but the very second other type of failure is at 0.1% - that would still make the DCT failures our #1 problem. So, what I’m arguing about here (I know I’m getting carried away and I promise this to be my last post on this subject) is that by observing posts on other car brands forums one could notice, as an example, that excesive oil consumption is a very common problem for BMWs but not necessarily for Hondas. Unfortunately, in our case, transmission failures are a common observed problem and one can argue that if the DCT failure rate is at 1% or lower, this whatever number it is, could represent an unacceptable failure rate for our industry. What’s worse if that after 5 years of C8 production the transmissions are not fixed or at least improved. This is what bothers me (I still love my C8 but I’m starting to get a bit worried when I don’t see GM addressing the root cause).

 

DefaultQuote:
Originally Posted by kellyreno

AC compressor failed at 5,000 miles. Was running the defroster/heater at the time, OAT about 45 degrees. Slowed for a railroad crossing and when I accelerated it sounded like a grenade went off behind me. My first thought was the DCT had blown. No warning lights, went home and then to the dealer. Car has been in the shop since Wed. on Monday they told me the wait is for the receiver/drier. They hope it comes later this week, Tech said there was a big mess when he dropped the pan. Green slime (I thought R134 was Blue) along with metal fragments. He thought it might not have been filled with oil. No telling how much has contaminated the system. A lot of plumbing to purge with the condensers way up front. Hoping for a positive outcome.
Car is still not fixed. Not only that they have damaged the rear bumper in two places. Meeting tomorrow with the owner and the service manager. So a simple warranty repair turns into a major hassle.
We should expect higher quality standards when buying a 86k car.
Finally fixed on March 3, went in on Feb 19. Still waiting for the body shop to call about the damage repair. Going back tomorrow for a ride with the shop foreman to investigate the knocking/rattling noise coming from the right rear where the bumper was damaged. The fun ended real quick with this new car!

 

 

What should we be looking at?

 

guys I am really dumb! I had my mechanic come out and it’s how the c8 is I thought the screws came undone but I was wrong that’s how it shows. This is my first vette ever! So I was worried lol. Sorry!

 

Still not sure what the picture was supposed to show.

 

Took my 2023 C8 in for what I thought was a routine 7500 mile transmission filter / fluid / oil change. During the visit, the tech discovered a leak in the rear diff. Today the dealer informed me the entire transmission needs to be replaced.

2023 Rapid Blue HTC / Z51 / 3LT / Twilight-Tension / Mag Ride / Lift / Aero Delete / Low Pro Spoiler & Splitter / Carbon Flash Wheels​​​​​​

 

For a leak? Why? Did you have any codes? Any drivability complaints? Does GM just not care about fixing these things? Seems like a lot cheaper to fix a leak than replace a trans.

 

No complaints, no codes, no issues...was just in for the regular maintenance to change the filter at 7500 miles. For some reason Chevrolet is opting just to replace the entire transmission rather then fix the leak...doesn't inspire the greatest confidence to be honest.

 

Think about this….if it’s much cheaper to repair a transmission than replace it completely don’t you think GM would do that?

 

If it's DCT case porosity then the only fix is replacement.

 

Curious as to your build date. Just had my 7500 mile today on my ‘23 Z06 and a clean bill of health (for now). Car has been flawless except for 3 consistent high oil dilution levels @ 3%, although all metal readings are presently normal.

 

You may be interested to know amongst other issues on my C8 convertible at 2,000 klm's (front lift not working, roof stopped working, dash glovebox not opening, left side demister not working) I also have the paint chip where the two panels meet under the right headlight. Panel alignment is also bad here. Eventually got repairs authorized under warranty at a Mercedes approved body shop, the only one I will use. Cost is over $3000. Dealer wanted to get it repaired for $600. Got to be kidding.
It goes in for painting on the 9th April. They need to strip the entire front off to ensure the repaint is invisible. No crappy masking tape around the headlight etc which is what you would get for $600. I also paid (no free first service in Australia) to have engine oil/filter plus gearbox oil/filter changed at only 4000 klm !!.
Why? GM have never stated what the issue is with the gearbox. My own theory is clutch material clogging the change valves? This will happen the most with a new car so rather than take the risk I did what probably no other new owner would do. Prefer to pay rather than have the hassle of a gearbox issue. We shall see if I'm correct. I also intend to never use launch control. Aaah the cries I here.

 

https://www.corvetteforum.com/forums...eadlights.html

 

This was my full timeline:
5/13/2022 Deposit (Waitlist #1494 MacMulkin)
1/24/2023: Status 3000 Received Email #1 GM
2/3/2023: Status 3300 TPW 2/20/2023
2/14/2023: Status 3400 Received Email #2 From GM
2/20/2023: VIN # Allocated
3/3/2023: Status 3800 Vehicle Produced
3/14/2023: Vehicle Arrived at MacMulkin
3/22/2023 Shipping Confirmed with Intercity Lines
4/13/2023 Vehicle Picked up By Intercity
4/23/2023 Vehicle Delivered

 

I am a new C8 owner. Traded my C7 for it. The vehicle is FANTASTIC in my view. Are the old C7 problems resolved in the C8? Any problem with the fuel door not opening when the vehicle is unlocked. It looks similar to the C7 system of a pin being pushed into a hole. If the pin doesn't retract, the fuel door won't open. How about cracked and bent wheels, a rather common problem with C7 Grand Sport spun cast aluminum wheels? Colorado roads are rough as a cob, and I try to avoid pot holes and keep my speed down. The C8 "base wheels" looks stronger. Hope so. This is a huge forum and searching is a hit or miss deal for me. Appreciate you long term owners views.
David

 

Service lift system error at 5,000 miles. Been at the dealer for 6 weeks. No resolution. Hit the lift button, the car raises then goes right back down. 1 pint low on lift system at 12,000 miles. Still unresolved. They replaced the leaking shock no the system won’t respond to the new sensor on the shock

 

The fuel door problem doesn't seem to have carried over to the C8. And the Stingrays don't have the wheel cracking/bending problems the C7 wide bodies had.
The only carryover problem I can think of is the 3LT dashes still have reports of adhesive failure.