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There is still no official confirmation from Chevrolet about an eight-speed automatic transmission making its way into the C7 Corvette Stingray, but the Corvette's chief engineer Tadge Juechter seemed to focus on when – not if – the new gearbox would be ready. In a conversation with Auto Guide, Juechter suggested that we might not see the new transmission until 2016 as other Corvette projects continued to be developed.

First up for Chevy engineers is to focus on the all-new 2015 Z06, which is still undergoing final development testing and will be the first to utilize the eight-speed. After that, then Chevy would have more time to calibrate this transmission for use in the Stingray in regards to traction control, launch control, etc. This transmission would likely be used in other Chevy products, including the possibility of the Chevy Silverado.

In the interview, Juechter does give us a hint at just how fun the new gearbox will be in the Corvette (whenever it arrives) as he states that the eight-speed-equipped C7 is "like driving a sports bike."


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  • 52 Comments
      AnalogJesse
      • 11 Months Ago
      That's a shame. I've been driving manuals all my life, but my left knee really can't take much more.
      john m
      • 11 Months Ago
      It's really too bad that the 8 speed will be available that late. Really, it sounds like it's only a year behind the Z06 but still it would have been great if it would come out at the same time. And then I'm wondering how long the 8 and 9 and 10 speeds will come out for the rest of the GM lineup. Cars like the Regal GS really need the 9 or whatever speed transmission. I seriously hope this doesn't mean that these 9/10 speeds will come out in 2017 or later. All this being said, I can't wait to see this new 8 speed, especially in the Stingray. I have a very strong feeling that the Vette with this new transmission will be FASTER than the Vette with the 7 speed manual. If that is the case THEN the question will be, is it better to get the manual or the automatic???
        Hi
        • 11 Months Ago
        @john m
        Even if the A8 is faster, the control is going to be poor compared to a stick, and downright pathetic compared to a DCT, especially on downshifts. Dealying the A8 for the Stingray is just more of GM being a slimey salesperson trying to squeeze the most sales/pennies out of their customers. But the stick, slushboxes are a joke compared to a DCT.
          stonehunte
          • 11 Months Ago
          @Hi
          Most people don't care about going around a track 2 seconds faster with a DCT. Most people drive their cars on the street and the manual is better for that.
          carguy1701
          • 11 Months Ago
          @Hi
          Y'all really need to see somebody about this inferiority complex you have, Rob. Its getting annoying.
        stonehunte
        • 11 Months Ago
        @john m
        The manual will still be more fun to drive and that will never change, unless god forbid they stop offering the manual.
          stonehunte
          • 10 Months Ago
          @stonehunte
          I've got approximately 150K miles behind a manual. You just need to learn better clutch control. If you really know how to drive your car, you can take off and shift smoother than an auto, if you want to.
      bahill99
      • 11 Months Ago
      Seems like resources should have been poured into a proper DCT for a vehicle like Corvette instead of a regular auto box. But then again, it seems as though most Corvette buyers are content with slushboxes anyway, so I guess they didn't see the need.
        sp33dklz
        • 11 Months Ago
        @bahill99
        Most Corvette buyers are too old to row their own gears anyway, so they\'ll take what they can get in the auto department. It is America\'s geriatric sports car.
          Cory Stansbury
          • 11 Months Ago
          @sp33dklz
          Hi, please tell me the theoretical basis for why a DCT is superior than a planetary style automatic.
          cfphelps
          • 11 Months Ago
          @sp33dklz
          @fordskydog Look up age demographics of any vehicle that starts in the mid 50s price wise, most aren't better than Corvette.
          Hi
          • 11 Months Ago
          @sp33dklz
          Started buying corvettes with a 6spd when I was 22. You're an idiot for saying that. What do YOU own that's faster than a modern Vette? On the other hand, they're so many stupid GM leg humpers regurgitating GM lies in here, I understand why outsiders would thing Vette owners are stupid and old. Well, many might be, but not the ones I track my Corvettes with.
        Nick B
        • 11 Months Ago
        @bahill99
        If you did a little research you'd know that GM could not find or design a DCT that would hold up over the long haul because of the power and torque from the LT-1. Plus, according to the head engineer, the new 8 speed actually shifts faster than Porsche's PDK. DCT's arent the be all end of non- manual performance. ZF's 8 speed from what ive read is fantastic and is MUCH smoother when you arent going 10/10ths.
        Bernard
        • 11 Months Ago
        @bahill99
        The auto in the Stingray outperforms the DCT in the 911. It's faster and smoother. DCT isn't needed anymore.
          cfphelps
          • 11 Months Ago
          @Bernard
          There is no DCT that can reliably take Z06 (or even stingray) torque AND still fit in Corvette's architecture. The one's that fit can't hold the torque, the ones that can hold the torque don't fit. Considering how small Corvette's engineering bucket really is within GM, the business case just isn't there to make a DCT just for the Corvette (and possibly some V-series Caddies). If the 8 speed has comparable shift times to a DCT, and delivers the up and downshift response times needed to compare with a DCT, while having better low speed/around town manners, then they've made a good call. No one has driven the new GM 8speed, so any claims about speed other than GM's stats on upshifts are just speculation. @Hi, Instead of claiming GM/Tadge are liars, please provide facts disproving them that aren't just your opinion based on what you think you know about transmission internals.
          Julius
          • 11 Months Ago
          @Bernard
          What folks like bahill99 and Hi conveniently forget - other manufacturers use slushboxes in their high-performance vehicles too. Most notably, Audi - they used a ZF 8-speed in place of their DCT when making a RS7 from an A7.
          Chris O.
          • 11 Months Ago
          @Bernard
          @Hi/Rob/Evo: A TR6070 weighs about 130 pounds (dry), while a GR6 (without the differential) weighs about 280 pounds (dry). For the sake of argument, lets ignore for a moment that the GR6 is physically much larger than a TR6070 (that's still imagining the GR6 not having the diff on it). AFAIK, Porsche's PDK tops out around 500tq, which is considerably less than what the LT4 puts out. The GR6 would not be able to cope with the torque of the Z06 without some structural and cooling enhancements, as well as a set of upgraded clutch packs. The additional cooler and case reinforcements would drive the weight up to at least 300 pounds (dry). If you don't like the TR6070 comparison, the 6L80E weighs about 215 pounds WET! Adding that much weight doesn't seem like a great idea. Packaging is another issue, if you use something like Borg-Warner's transmission. To clarify Juchter's point, though, he didn't say that making a DCT that would work in a Vette was impossible... he just said that there wasn't anything around that would meet their needs. Power handling, packaging, cost, weight, economy, and durability all factor into those needs. The upgraded GR6 retails around $30,000 for the unit (and the enhancements)... sure, that's not the COST, but a TR6060 that has the same capability retails around $3,500. A bespoke unit would by the proper physical size, have the proper power handling capability, and be awesome... but would be dreadfully expensive. At a component cost like that, you can only expect Z06 (ZR1, in the future), ZL1, and Cadillac V car buyers to even consider it.
          Chris O.
          • 11 Months Ago
          @Bernard
          @hi/rob/evo: I don't know where you can get a NEW GR6 transmission for $11000. The cheapest I've seen is $14,000 shipped, and I don't even know if the site was legit. Even if it was, it doesn't change the fact that the GR6 can't handle 600tq for very long. After you clip, brace, replace gearsets, replace clutch packs, and redo your Trans cooling, you have a much more expensive unit. Even getting my GR6 to stage 3 was shockingly expensive. an OEM solution warrantied for 5yr/100k mi. would have to be a lot more civil and better engineered.
          carguy1701
          • 11 Months Ago
          @Bernard
          Rob, please, for the sake of everyone's brains, GET HELP. You clearly have an inferiority complex. >The GTR transmission is $11,000 Yeah, and that's part of why the GT-R costs as much as it does. Nissan does not use a DCT in ANY OTHER vehicle they make, which means they can't spread out costs, meaning that the customer foots the bill, as usual. >THe Mercedes SLS proves Tadge is a LIAR How, exactly, does it prove he's a liar? The SLS doesn't share a platform with any other Benz, and the SLS DCT is Mercedes' ONLY RWD car with a DCT. Non-AMG RWD Benzs use the 7G-Tronic, and will likely migrate to the 9G-Tronic (or whatever Benz chooses to call it) when that transmission is ready for prime time. AMGs that aren't the CLA/GLA45, SLS, S65, or SL65 use the AMG MCT, which is just the 7G-Tronic with a wet multiplate clutch in place of the torque converter (the V12 cars use a massaged 7G-Tronic which retains the torque converter to meet expectations of customers buying those cars, and teh CLA/GLA use transverse engines mated to a transverse dual clutch transaxle). Seriously, we can pick apart every argument you make. Just stop.
          JaredN
          • 11 Months Ago
          @Bernard
          No, it isn't faster than a DCT.
          Daekwan
          • 11 Months Ago
          @Bernard
          Yes. It is faster than a DCT. This was clearly stated by the same Corvette chief engineer Tadge Juechter. The have literally tested it against every DCT available on the market right now and it shifts up to 8/100ths of second QUICKER than the Porsche PDK in the 911. Furthermore. Every DCT solution was bigger & heavier than the 8spd auto coming in the C7Z06. If it makes you DCT die-hards feel better, a DCT has two clutches.. while the new 8sp auto in the C7Z06 has five clutches.
          Hi
          • 11 Months Ago
          @Bernard
          Only an IDIOT believes GM's marketing bull$hit about their pathetic slushbox competing with DCT. Tadge is a LIAR and he MUST give the Corvette a DCT ASAP. Corvette will remain to be 2nd class until it gets a 1st class DCT, and I have been a new Corvette owner for the last 20 years. As a 1000cc Spotbike owner (Gixxer 1k, ZX-10), Tadge's comments are ridiculous. Stop being a slimy used car salesman and making pathetic excuses, Get a DCT in the Corvette, Camaro, SS Sedan, ATS, and CTS IMMEDIATELY!
          Chris O.
          • 11 Months Ago
          @Bernard
          @JaredN: That's the 6AT in the Stingray, not the 8AT in the Z06.
          Hi
          • 11 Months Ago
          @Bernard
          You guys are ALL IDIOTS if you believe GM's LIES. Now, we have Autoblog members posting LIES. The GTR transmission is $11,000. THe Mercedes SLS proves Tadge is a LIAR. You fools need to educate yourselves or stop lying.
      jebibudala
      • 11 Months Ago
      Doesn't matter anyway. Most people who drive Corvettes go well below the posted speed limit. The other day, a line of traffic was stuck behind a Prius in the left lane, a Vette in the right lane, both going exactly 7mph under the speed limit.
        Hi
        • 11 Months Ago
        @jebibudala
        Stupid post. What do YOU actually own? you'd probably wreck a ZO6 if I let you borrow it for the afternoon.
        Scooter
        • 11 Months Ago
        @jebibudala
        Vette drivers are usually older men. 50-65+. Why? Well its pretty expensive. Very inconvenient for a young mans lifestyle since its only a 2 seater and is very expensive for young men. 25 yr old guys with used early 2000's Vettes, not talking about you. Talking about new and nearly new. I see young guys being stupid in 1990s&early 2000's Vettes, but never see a newer Vette being stupid on the road. Late model Vette drivers are known to be calm, cool and collected drivers that aren't trying to put lives in danger to prove something.
      mbukukanyau
      • 11 Months Ago
      This transmission is not going to be used in the Silverado. In Case you have not been paying attention, GM and Ford have a JV that developed their FWD six speeds. (Not in the XTS or high powered ecoboosts) That JV is jointly developing 9 speeds for FWD applications and 10 speeds for RWD applications. (Hence F150 Mules going to GM development facilities) This 8 speed is a GM performance division product. So It’s going to the V’ Cadillacs and stuff like that. Its never going into Silverado, unless you know of a performance variant coming up.
        carguy1701
        • 11 Months Ago
        @mbukukanyau
        It is? I thought that the 8-speed would go in the trucks.
      dondonel
      • 11 Months Ago
      DCT is great on the track and poor in trafic. On the track, under hard braking or acceleration, it is easy for the gearbox to know what to select for the next gear. That is not the case in trafic. DCT can only preselect one gear, in contrast to a regular automatic which has all the gears preselected. That's why the current gen of autoboxes (with downshift revmatching) have consistent up and downshift times in trafic, while DCTs don't (they often and unpredictably stick longer in gear). BTW, I pretty much sampled all DCTs, from VW to BMWs.
        fordskydog
        • 11 Months Ago
        @dondonel
        You are wrong. I have passat tdi with dct. After first 1000 miles you would have a hard time telling it apart from a torque converter. It is just as smooth as you are smooth on the gas. It was a bit grabby when brand new, but so are manual clutches. I love it when peeps hate on new tech.
          dondonel
          • 11 Months Ago
          @fordskydog
          DCT is hardly new tech, it has been around for more than a decade. Also, I had a Passat with DCT for three years.
          Cory Stansbury
          • 11 Months Ago
          @fordskydog
          Porsche actually had it in race cars in the 70s or 80s...so yeah, not "new."
          Mike
          • 11 Months Ago
          @fordskydog
          @Cory Stansbury Are you sure you didn't mean Dog Box (wayyy different than DCT)? DCT didn't even come to light until early 1980s and then made it to race application in the later 80s and now is computer controlled with many other advances in production road going cars. http://en.wikipedia.org/wiki/Dual-clutch_transmission
      Rochester
      • 11 Months Ago
      Does it really matter? Why would anyone buy this car with an automatic transmission anyway?
        chonnes
        • 11 Months Ago
        @Rochester
        Why? Knee health issues, convenience, gas mileage, dual drivers, desire, performance, availability, . . .
        mikemaj82
        • 11 Months Ago
        @Rochester
        Because it's more efficient and faster than a manual. It's 2014.
        carguy1701
        • 11 Months Ago
        @Rochester
        The auto is part of why the Corvette still exists. I don't know what world you live in, but here in the real world, most of the base cars are equipped with them. Helps deliver when it comes to run the balance sheet.
        AnalogJesse
        • 11 Months Ago
        @Rochester
        I have a bum knee :(
        Teleny411
        • 11 Months Ago
        @Rochester
        I also think that the vast majority of people and many in this blog don't know how to drive a MT. We need to teach family, friends, and especially more women. Although automatics are more efficient these days MT is more fun,
          AcidTonic
          • 11 Months Ago
          @Teleny411
          MT is more efficient... It's not apples to apples. The autos that supposedly get better mileage, are geared higher with more engine deactivation/tuning tricks allowed because the driver is one-layer removed from controlling everything. For instance, until very recently autos did not cut fuel when coasting like manuals do... When all the other variables are kept the same such as gear ratios and engine tuning, a properly driven manual will always get better mileage.
      carguy1701
      • 11 Months Ago
      While I understand wanting to get the 8-speed right, can they afford to wait that long? CAFE concerns might force their hand.
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