Originally Posted by Midnighyt

Driver side door window failure.

Today I started my car (636 miles) in the garage, and rolled down the drivers side window with the door closed and at the last 10% left to go down, it dropped harshly into the door. It hesitated to roll back up with lots of nasty grinding. Once it reached the top, it wouldn't roll down again. The dash then displayed. "roll window down and up again" so I guess a sensor wasn't getting the data it needed. I drove to the dealer about 30 miles away and while on the highway the window started to fall down into the door. When it was down about 50% I was able to lift it by hand and let the motor catch it and bring it back up to a full close, I heard lots of grinding and possible broken glass. Dropped it off at the dealer, the window wouldn't roll down, but you could push it down after the motor cranked a bit, yet more grinding, pulled on it and let the motor lift it back up... the sensor does not detect if the window is fully up and the dealer attempted to shut the door when it was fully up... OOF big clunk off my roof top panel... No damage tho

Awaiting a call from the dealer after they get into the door and determine the issue. I will post a follow up

Originally Posted by joshp14

Window regulator fell apart. The grinding is the window motor tugging on the cables that likely fell off the pulley(s).

Originally Posted by Midnighyt

Yep, that's what happened, and there are no parts available...

Originally Posted by Midnighyt

Driver side door window failure.

Today I started my car (636 miles) in the garage, and rolled down the drivers side window with the door closed and at the last 10% left to go down, it dropped harshly into the door. It hesitated to roll back up with lots of nasty grinding. Once it reached the top, it wouldn't roll down again. The dash then displayed. "roll window down and up again" so I guess a sensor wasn't getting the data it needed. I drove to the dealer about 30 miles away and while on the highway the window started to fall down into the door. When it was down about 50% I was able to lift it by hand and let the motor catch it and bring it back up to a full close, I heard lots of grinding and possible broken glass. Dropped it off at the dealer, the window wouldn't roll down, but you could push it down after the motor cranked a bit, yet more grinding, pulled on it and let the motor lift it back up... the sensor does not detect if the window is fully up and the dealer attempted to shut the door when it was fully up... OOF big clunk off my roof top panel... No damage tho

Awaiting a call from the dealer after they get into the door and determine the issue. I will post a follow up

Originally Posted by 19/C7Z

Any updates on the owner's that encountered DCT related issues?

I noticed that the guy who runs his C8 all the time on the street and strip hasn't posted a video in days after saying he brought his C8 in because of that janky 1-2 shift he was experiencing in his last two videos (corvette Direct is the name of the channel).

Originally Posted by 19/C7Z

I would like to hear some outcomes whatever they may be.

Originally Posted by C8PRO

Today just before reaching my first 400 miles the transmission started only changing from gears 2-4-6-8.... turned off and on and same issue... later on the way back home (good thing I was close to home) it wouldn’t change from gear 2 for a while than it started again back to head 2-4-6-8... its like the car doesn’t recognize gears 1-3-5-7. I guess it’s the price to pay for been in the first batch of production.... I’ll be contacting my dealer tomorrow.....

Could help my self and restarted the car and back to normal.... I didn’t try putting it in reverse the first time... but in any case just drove the car for some 20 miles and just like if nothing ever happened😁!!!! Happy for that but concerned about when will this issue shows again 😟...

If anyone has experienced something similar, please reply and let me know...

Besides this issue the car has been just pure joy... perfect in every way....

I will keep updates as GM is contacted and I get information about this issue!!!

i got my car in service today... they believe it has to do with the car learning the driver patterns and so on. They uploaded a refresh update in my odd gears into the system and most importantly I got my car back the same day!!!! I will inform periodically on this situation.. my hope is that all is good and taken care now!!!! C8 rocks and yes I will be in line to buy it again.. it’s beyond imagination...🏎❤️It!!! 😀

Hi folks, my Corvette was serviced yesterday 3/24/2020. The technician was able to recover 3 codes (P0700, P2838, P2839) if anyone can help me understand what they mean that will be awesome...

with intense help from GM tech support, the transmission programming for odd gears was reset and reloaded. GM believes it is possible that is related to the learning mode and so on...

I got my Corvette back at the end of the day... 😄...

Take care for now!

Originally Posted by C8PRO

thanks for the info.... in checking my email later... I got an email from GM... Onstar picked up with the issue and sent me an email requesting me to bring the car to attend an “engine/transmission” problem!!!! Amazing how technology works know a days...

Originally Posted by Gearhead SS

One of our initial cars(#18XX) developed a trans issue on the drive to fill it with fuel(we don't have premium fuel onsite). Just normal driving at around 50-55mph, it started skipping the odd gears. It would start in 2nd gear from a stop and would lag badly when shifting and then would skip the odd gears. We contacted a Corvette Engineer and he had our tech go through and disconnect all connectors to the trans and look for a crimped or damaged wire. None were found so he hooked everything back up, connected the battery back up and took the car on 20 mile R&D drive to log the trans information on his laptop. Customer was aware of this and was totally fine with it. Car has not had another issue and is working as it should now.

Our best guess is that something just wasn't making the right connection. The engineer told us that we were the first car to have this issue. The only other issues reported to them by other dealers so far was some trans fluid leaking and some units being slightly low on trans fluid.

Originally Posted by Gearhead SS

One of our initial cars(#18XX) developed a trans issue on the drive to fill it with fuel(we don't have premium fuel onsite). Just normal driving at around 50-55mph, it started skipping the odd gears. It would start in 2nd gear from a stop and would lag badly when shifting and then would skip the odd gears. We contacted a Corvette Engineer and he had our tech go through and disconnect all connectors to the trans and look for a crimped or damaged wire. None were found so he hooked everything back up, connected the battery back up and took the car on 20 mile R&D drive to log the trans information on his laptop. Customer was aware of this and was totally fine with it. Car has not had another issue and is working as it should now.

Our best guess is that something just wasn't making the right connection. The engineer told us that we were the first car to have this issue. The only other issues reported to them by other dealers so far was some trans fluid leaking and some units being slightly low on trans fluid.

Thanks.... my car is the service department now. By now in this forum there are 3 reports with same issue...

Originally Posted by C8PRO

Hello Folks,

To keep it short, not good news..... My car is now in the service department for a full transmission replacement. My odd/even gear issue reappeared and GM immediately decided to swap the transmission and to send back my transmission for forensic work. Apparently they have identified a failure with something inside the transmission preventing the odd gears to engage and only keep changing bt even gears. For additional details on my issue you can see my earlier posts. While I am not happy about having to go thru this, I commend GM for the decision to replace the transmission and to send it back to fully understand this issue to prevent a potential painful recall situation in the future. I wish GM technical support contact me directly for a dialog on my situation and for ways they can compensate me for this very unfortunate situation.

I will keep posting as get more updates. omeprazole Magnesium

C8PRO

Originally Posted by Texas’s Girl

New Member! Decided to take my baby for a drive Sunday. Only 238 miles. Went to a family members home and parked. Their driveway has a steep incline. When I was ready to leave my car would not go into reverse. Finally just rolled into the street and was able to go into drive. Once I was home I tried again and reverse worked. Was talking with other C8 owners and they suggested I have it check for low fluid. Call and made a appointment today with dealer. I notice on the drive there that the car was shifting hard from 1st to 2nd. Also the “idle creep temporary disappeared’ light came on at every stop I made. Dealer called after a few hours and informed me they were waiting on GM to call them back. (Also when I drove up to the dealership their drive had a steep incline. I parked the car and the technician call me and said the same thing happen to him. He could not put the car in reverse. Hopefully will find out something tomorrow.

Originally Posted by C8PRO

Well, I requested a separate thread for transmission issues? But it didn’t last long...

so here it goes the combined post...

On 3/22/2020 just before reaching my first 400 miles the transmission started only changing from gears 2-4-6-8.... turned off and on and same issue... later on the way back home (good thing I was close to home) it wouldn’t change from gear 2 for a while than it started again back to head 2-4-6-8... its like the car doesn’t recognize gears 1-3-5-7. I guess it’s the price to pay for been in the first batch of production.... I’ll be contacting my dealer tomorrow....

Couldn’t help my self and restarted the car and back to normal.... I didn’t try putting it in reverse the first time... but in any case just drove the car for some 20 miles and just like if nothing ever happened😁!!!! Happy for that but concerned about when will this issue shows again 😟....

If anyone has experienced something similar, please reply and let me know...

Besides this issue the car has been just pure joy... perfect in every way....

I will keep updates as GM is contacted and I get information about this issue!!!

On 3/24/2020 got my car serviced got my car serviced, they believe it has to do with the car learning the driver patterns and so on. They uploaded a refresh update in my odd gears into the system and most importantly I got my car back the same day!!!! I will inform periodically on this situation.. my hope is that all is good and taken care now!!!! C8 rocks and yes I will be in line to buy it again.. it’s beyond imagination...🏎❤️It!!! 😀

The technician was able to recover 3 codes (P0700, P2838, P2839) if anyone can help me understand what they mean that will be awesome...

With intense help from GM tech support, the transmission programming for odd gears was reset and reloaded. GM believes it is possible that is related to the learning mode and so on...

Now is 3/29/2020 and my car had the same transmission issue Again.

To keep it short, On 3/31/2020 my corvette went to service department for a full transmission replacement. My odd/even gear issue reappeared and GM immediately decided to swap the transmission and to send back my transmission for forensic work. Apparently they have identified a failure with something inside the transmission preventing the odd gears to engage and only keep changing bt even gears.

While I am not happy about having to go thru this, I commend GM for the decision to replace the transmission and to send it back to fully understand this issue to prevent a potential painful recall situation in the future. I wish GM technical support contact me directly for a dialog on my situation and for ways they can compensate me for this very unfortunate situation.

I will keep posting as get more updates.


It is now 4/12/2020 and my car is still in the local dealership service waiting for the replacement to happen. It took several days (almost 2 weeks) for GM to authorize the transmission work....

I will be reaching GM this week to discuss my situation.

I will keep posting periodically.

Best, C8PRO

Originally Posted by bvontress

As an update on this issue, it's now been a week, not the day they told me. They said that due to the factory shut down, the parts staff is on a voulanteer status and its been very difficult to get part. Supposedly, my part has been shipped twice. They are told it is overnighted and they were charged extra for it. But, they can't get tracking information of any kind. They don't know if it really shipped or where it is. They all believe it wll be here soon, but my car sits with 175 miles on it. There are definitly bigger problems in the worls, so I try to focus on that instead.

Originally Posted by Ralph Rader

C8PRO / Unfortunately my car began to have these same transmission issues today at around 625 miles. It will no longer go into any of the odd number gears. Just all of a sudden happened which was really weird. I was just cruising along on a minimal grade and it felt like the tranny just slipped all of a sudden. Happened in the early part of a planned long drive today and I had to cautiously get myself about 50 miles back home. Going to schedule a trip to the dealership shortly. So disappointed as I am absolutely loving the car. Hopefully this can be resolved soon.

Originally Posted by C8PRO

Looks like you will also need a new transmission.... best of luck and contact me anytime during your process... I know the feeling....

Originally Posted by Bobbyc99

Well looks like my problems are mounting up today a message popped up saying park car shifting will go out shortly car started knockd and a slight vibration was felt. A burning smell of oil or trans was strong. Had it flat bed towed to local dealer. Be warned I’m the third C8 with their response. Bowling green is not adding enough transmission fluid.

Originally Posted by srosenbldr

Transmission would not go into gear shortly after startup. Check engine light came on. Trouble code said transmission not communicating. I hope there is a quick fix.

Originally Posted by salemusa

same problem but dealer order new seat no problemo

Originally Posted by Capt Mike

I'm wondering if this particular paint issue is a Peeling of the paint from compression, the two body parts pushed together.

I downloaded both photos and their in the same location nd nearly the same appearance, I'm of the opinion that this paint has been pushed up and most likely in transit, pinched the body panels and HL assembly, hence the peel. The clearances are tight, better seen in the lighter color.

I've seen this before in Corvettes, in particularly the C4 polyurethane bumper covers both in transport, steep approach often from using short ramps. while unloading the car. During assembly of a freshly paint new bumper cover, fasteners being over torqued. Partially the rear cover. where the cover is joined to the quarter panel. Paint peeling by lifting with a hydraulic jack under the cover or people pushing the car, again all with fresh paint.

Just a thought. I watched a video wit hone Tech walking the C8 with a ring of body gauges in Hand. He was checking all of the body Gaps. Seems unlikely this paint defect could be missed in the B.G .assembly plant and missed by so many...

Michael..

Originally Posted by PorscheNut

People have to realize that a Corvette isn't a Porsche or a Ferrari or even a Honda when it comes to fit and finish. It is, however a fantastic performance bargain. I am 70 years old and have never owned an American car. I have a 2020 HTC on order and I am totally excited to get it. The C8 is probably the best American sports car ever, but it's not a Porsche.

Originally Posted by OnPoint

Stop sitting on the bolster when getting in and out of the car, and the seat won't look like that.