Does anyone know if there is a delay in shift response similar to what is being experienced in the standard A8 Stingray?

 

No, no one really knows yet, KraZ.

In about 4 weeks a lot of us will know. Myself included.

 

The recent Jalopnik review commented on this:

 

Agreed, you shouldn't say it is as good as a something else when it's not. Kinda getting tired of GM doing that. Porsche PDK defined how dual-clutch trannies should perform and set the bar real high.

Edit: I know the A8 is not dual clutch, but saying it's as good as the PDK might be misleading.

 

In fairness to GM, I don't know that they ever claimed the new A8 to be all-around equal or better than the PDK.

They did make certain specific claims however:

 

Yea, I've read that before but not sure if they are referring to the shift speed as it shifts into gear or the actual response time after the paddle has been triggered. For a lot of people this is quite important.

 

Lol I played both Sampras and Agassi, thought Agassi was the bettor player by far.

 

http://gmauthority.com/blog/2014/08/...e-first-drive/

Check the NOTE: "Total time is from shift initiation until final gear acceleration is reached."

Paddle (tap mode) is also shown on the far right.





Lots of discussion on the A8 in this Thread:

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

 

Good find, thank you

Edit: I'll have to find out whether the Z's A8 will be different in performance than the standard car, since I think these benchmarks and the gm authority review covers the non-Z06 Stingray.

 

Even though GM worded there claims accurately, the whole purpose of these claims was to give the impression that the transmission was as good or better than the PDK and that was evident in the understanding of most of the members here. Reality is it is not as good as the PDK in all aspects and this has negatively impacted GM, when in fact if they stayed quite about it people would most likely be raving of how good an automatic it is.

 

yep, that's why it's important to choose the right words.

Quote from 4 Rooms:

"The less a man make declarative statements,
the less apt he is to look foolish in retrospect"

I love that

 

Can you imagine how fast a company would fire the press writer who stated our 8L90 is not as good all around compared to a PDK transmission when the driver fools around with the paddles...

Doesn't matter that left to its own devices the z06 with the 8l90 will crush the performance of any Porsche PDK under 100 grand....if not even the almighty Porsche turbo PDK S.....and possibly even the relatively stripped hard core GT3 ...

I'd pay good money to read the gm press release that stated the 8L90 blows in comparison to the 150 grand porche turbo PDK....even though both are faster when left in drive and the driver leaves his mitts off the flappy paddles...

 

wait, what? you are/were a world class tennis player??? on in a video game?

 

Agreed. But I am not surprised that the lead engineer chose to highlight the positive aspects of his new creation with some one-upmanship, even if it didn't represent the full picture.

 

Yeah...I'm real disappointed that we didn't hear the lead engineer state all the negative aspects of the 8L90 transmission during its initial release...

 

Dammit! I have an A8 on order…

Call me whatever you want, flame me if it makes you feel better, but I will say this: based on what I’ve seen out here in the streets “thus far” with current stock customers C7Z vs. friends who own other makes/models from the competition – GM somewhat over hyped this thing.

Gosh, what else with this thing….I mean, it pisses me off because there was so much hope for this new platform (stock wise); surely we can mod, and surely the car is much better than the C6 in many areas, but man it is one thing or another. Regarding the trans, I thought it was the car, but now I guess I was not crazy. You see, two weeks ago we test drove a nicely equipped Z51 A8 for the wife, I was not impressed with the trans it all!

I said to myself that surely the Z06 will be better, and now this article. Yeah it's only one article, but it hits me home because it somewhat echoes what I experienced during our test drive. Matters got even worse after we test drove a PDK equipped 911 C2S. That trans really impressed me, however, the wife was not too crazy with the overall looks of the vehicle, so out was that idea.

Nevertheless, time will tell how the A8 in the Z will really behave once in the streets with real people under real everyday driving and racing scenarios. For now though, I am not buying into any other GM marketing crap regarding the new 2015 Z06. I believe the stock TM settings is one of the many attributes contributing to the somewhat sloppier that anticipated A8 behavior...same as the previous trans. Sure, folks like me can easily tune out and/or adjust parameters to improve matters, but what if you do not want a tune?

Not being a “negative Nancy”, but as many of you who knows me know…I’ll tell it like it is. So far this new Z has me questioning my ordering decision...oh well. I have a customer car now (an M7) – the thing looks so pretty and shiny with only 288 miles; man I just wish the thing ran like a looks and like a TRUE 650HP car should, especially vs. its competitors. Oh well, I’ll be playing with it all next week.

Thanks,
Carlos

 

The A8 in the Z06 has been tested:

Milner paddle shifts the A8 Z06 at Road Atlanta!
Milner: "super quick shifts".

 

With all due respect, I am going to wait until production units are in user hands and see what kinds of reports we get then. It is not unheard of for GM to "tweak" their preproduction review units only to find that some changes have been made when the cars finally hit the consumers garages. But good video, thanks.

 

Seen this before...maybe a company test ringer...who knows. Nevertheless, note how many RPM's it drops between shift.

Go out and test drive a Porsche PDK, or AMG MCT or even the 7G Tronic and/or the BMW DCT trans...I think you'll see what I mean. I believe my old 2010 AMG 7G trans shifted and behaved better than the A8 Z51 we tested.

The C7Z A8 delivery delays had me thinking, but I went ahead and ordered it anyway. I hope GM figured it out.

Thanks,
Carlos

 

Yep played the ATP tour in the 80s.