optionray

It still sounds like my automatic transmission (2015 model with 2500 miles) is about to fall out when I floor it. Happens when the transmission is shifting from one gear to the next. - I am certain it is not the rev limiter

Dealer said there wasn't anything they could do without some kind of code being generated because they wouldn't drive the car or be ridden in the car under Wide open throttle.

Through testing many driving scenarios, it appears to do the same thing in all modes, including manual.

One member had suggested/thought that the issue might be I was starting off in 4 cyl and upon accelerating, the transmission went into performance mode along with the engine switching from 4 to 8 cyl at the same time, However that theory didn't prove out and the problem continues.

I also put the system in manual, floored the pedal, shifted at around 5500 rpm and the noise occurred from 1st to 2nd, 2nd to 3rd, and 3rd to 4th. I am certain something is seriously wrong based on the noise/hard vibration I am hearing and wonder if I have a serious transmission issue or possibly rear end issue that isn't generating a code.

As long as I'm not driving this way (aggressive), the only thing I experience is a slight noticeable shift from one gear to the next, but that doesn't bug me as much as knowing that I can't step on it when I need/want to and experience the thrill of my new car.

Wish I could work through this and find some kind of solution to this problem because I'm starting to get consumed by it. I would trade it in on another vette, but I wouldn't want someone else to have to experience this same disappointment.

Any ideas would be appreciated, thanks!

arcticblast

Take it to another dealer that will try to replicate the noise.

Sordz

Dont worry, ALL auto c7's do it. There have been many threads about it, here is one for example-

https://www.corvetteforum.com/forums...-question.html

optionray

Don't think it's the same thing, but thanks for the reply!

FlashofRed

The one thing you said that stands out to me is...

"As long as I'm not driving this way (aggressive), the only thing I experience is a slight noticeable shift from one gear to the next..."

I have a 2015 Z51 A8. Although, I only have a little over 600 miles on the car but everyone who has rode with me has commented on the smoothness of the A8. One person couldn't get over how clean and smooth it was especially when I jump it from about 10 mph to 90 mph. He was very impressed. I guess my point is IMO you need to have this checked out. I'd do what articblast recommends and take to another dealer. In addition, I'd contact GM customer service and explain the dilemma your in with this dealer.

WelderGuy

Take the car to RK Chevy in Vineland, NJ. Their techs seem to have no problem with going WOT in customer cars.

See: https://www.corvetteforum.com/forums...up-my-car.html