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There was a further mention by C&D in the May '18 article
Oh, did we not mention the transaxle? (Note that we used the singular form of the word.) There will be only one gearbox, and it won’t come with a clutch pedal. Chevy has been working with Tremec on a new eight-speed dual-clutch automatic unit. The driver’s involvement in shifting gears will begin and end with the steering-wheel-adjacent shift paddles.
I know that C&D has been accused of being inaccurate, but would they say this if they didn't have some knowledge?
A TC planetary is in the next gear already. All that needs to be done to engage it is to release one clutch while simultaneously engaging another corresponding to the next gear path. No extra gears or components need to move or align.
A planetary is actually in more than two gears at once, or more specifically, it has multiple gear paths available with only two clutch movements. This is why a transmission like the A8 can skip multiple gears on the downshift, with a single clutch release / another single clutch engagement, unlike many DCTs.
I think what we all want is a more responsive shift from paddle to engagement, while maintaining smooth fast starts and smooth operation. For a TC planetary, this comes down more to the actuation and various delays, than it does the actual gear or tc design. If GM can accomplish this with a brand new DCT or with a faster more responsive TC planetary, then I'm OK with either.
Its funny that we look to the media for answers when all the media seems to do is parrot what a select few here on the forum post
Very true. We're in a news feedback loop. Some of the "journalism" that gets done now is just horrible. Clickbait rubbish in most cases.
If I see an original "leak" in the media now I just assume it's official. Like those interior shots that showed up with some areas strategically blurred out.
Boy oh boy does that statement apply to so much these days....
Infiniti Q50 and Q60
Mk V Toyota Supra
BMW Z4 and everything else it seems
Many others.
The current 8 spd transmission has been problematic in all of GM’s cars and is not on par with PDK or other DCT transmission. Would be a crime to use the current GM transmission in the C8 ME.
The current 8 spd transmission has been problematic in all of GM’s cars and is not on par with PDK or other DCT transmission. Would be a crime to use the current GM transmission in the C8 ME.
In some ways, the A8 is better than some DCT transmissions.
Since the 10 speed is out the GM 8 speed is an obsolete trans and would not be used in the c8.
Great point. My 2019 GMC Sierra has the 10 speed and it is fantastic compared to the 8 speed. Will be trading in my 2016 Yukon Denali for a new Denali this summer. So no more crappy 8 speed. Both my last 8 speed transmissions had torque converter problems.
In some ways, the A8 is better than some DCT transmissions.
I had the A8 in my '16 Z06 and '17 3.6 ATS. Excellent transmission, have had nothing less than great performance and problems at all. The non "DCT" nature of the GM A8 is just a stupid way for losers to hate on GM and the Corvette.
I had the A8 in my '16 Z06 and '17 3.6 ATS. Excellent transmission, have had nothing less than great performance and problems at all. The non "DCT" nature of the GM A8 is just a stupid way for losers to hate on GM and the Corvette.
I realize most people probably have no issues with the 8 speed.....I just happened to be unlucky on 2 out of 2 times. My C7 had the 7 speed manual.....so obviously no issues there. I will say the new 10 speed from GM is VERY good!
I realize most people probably have no issues with the 8 speed.....I just happened to be unlucky on 2 out of 2 times. My C7 had the 7 speed manual.....so obviously no issues there. I will say the new 10 speed from GM is VERY good!
You could also say the new Ford designed 10 speed transmission from GM is VERY good. Even better than the GM designed 8 speed.
Think the C8 will be 7DCT because its still a mainstay of the Italian exotics.
That said some mass market manufactures are replacing the DCT with the ZF8 in high performance cars. BMW one on the last to offer MT's pretty much across the board has been withdrawing them over the past 3 years. They also ran 7DCT's in a lot of performance versions like the M cars.
Most new generation M cars like the M5 the two seater Z4 & 8 series sports car are ZF8 only now. My 2011 335is coupe was a 7DCT my 2014 430 & 2018 440 coupes were ZF8 because the 7DCT was no longer an option The ZF8 is a great transmission but it was still a great disappointment to me to not have the 7DCT. Best transmission I ever had in my personal opinion.
Last edited by BEAR-AvHistory; 04-09-2019 at 12:40 PM.
I bought my RS5 Audi in 2012 mainly for its high winding (8250redline) “swiss watch” nat asp 4.2L 450 hp V8 and ZF inspired 7 sp DCT.. I still love driving the car despite the 7 yr old technology. .. everuthing we love about the ZR1 it ISN’T, and yet, it manages to be a blast to drive. So what does Audi do with the “next gen” RS5... they replace the NA 4.2 V8 with a 6500 redline turboed 2.9 V-6 and the DCT got shucked for an 8 sp ZF torque converted automatic. Knocked .5 off the 0-60 of course with all the added torque. BUT.. who they making the car for? car mag stats /16 yr olds? I’ll keep my older gen one, thanks just the same.
Yet the 10 speed is calibrated better in the Camaro SS than it is in the Mustang. GM performance and dynamics engineers are world class.
But the GM side of the project with the 9 speed transmission they designed & built did not go so well. Don't think anyone has a lock on employing good engineers.
Last edited by BEAR-AvHistory; 04-09-2019 at 12:45 PM.
But the GM side of the project with the 9 speed transmission they designed & built did not go so well. Don't think anyone has a lock on employing good engineers.
Ford has some great engineers as well, but the company seems to rush projects into production and then perfect them with mid cycle model updates. I imagine three years from now the Mustang's 10A will finally be calibrated well.
07-01-2018, 02:34 PM
