C7 Corvette could get a dual-clutch transmission

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Thread: C7 Corvette could get a dual-clutch transmission

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    C7 Corvette could get a dual-clutch transmission

    http://www.autoblog.com/2007/10/02/c...-transmission/


    Late last Friday after the local union officials got to hear the details about the new GM-UAW contract details started emerging about future product plans. It looks like part of the cost for the company to get the union to make some concessions was to commit new products to a bunch of plants. At first we only heard about the assembly plants with the news that the Volt would be produced in Detroit and the small RWD Alpha platform would go to Lordstown OH. Now more of the contract is coming out including commitments to parts plants.

    Of interest to Corvette fans is a line item for the Toledo OH transmission plant which reads "RWD DCT for NG Corvette will be allocated (2012)". DCT typically refers to dual clutch transmission. That means the C7 'Vette will almost surely get a DCT. Another product for Toledo and the Baltimore transmission plant is the RWD Gen II Hybrid transmission for 2011/12. This could be an updated, and hopefully lower cost version, of the Two-Mode that could be applied to other applications. Hmmm... do I hear hybrid Zetas? One plant that isn't getting new product is the Livonia, MI engine plant that produces the Northstar V-8s used in Cadillacs when that engine dies in 2010. GM announced a new V-8 engine earlier this year that would be built at the Tonawanda, NY engine plant and the Livonia plant will close
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    Re: C7 Corvette could get a dual-clutch transmission

    Good to hear! Wonder how many gears? Could be an adaptation of the new 6 speed autos, or could the new trans be set up for more gears and a dual clutch system?
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    Re: C7 Corvette could get a dual-clutch transmission

    what is a dual-clutch transmission. I don't understand DAD
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    Re: C7 Corvette could get a dual-clutch transmission

    Sounds logical to assume. The Vette had often the new gimmicks. HUD, ESP(sort of) and ARS allready in the C4 Corvette generation. Than the LS1 in the C5.
    Perhaps due the low production volume and the high Price

    @boston boy

    This transmission design has two clutches. The first is connected to the gearsets 1,3,5. The second to 2,4,6. When in 1st gear, the 2nd gearset is already engaged except for the clutch (connection to the engine). The up-shift is an almost simultaneous disengaging of the first clutch and engaging of the second. If you ever drove a stick u can guess the timedifference.
    Last edited by GM LS-X; 10-03-2007 at 06:24 AM.

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    Re: C7 Corvette could get a dual-clutch transmission

    @boston boy

    This transmission design has two clutches. The first is connected to the gearsets 1,3,5. The second to 2,4,6. When in 1st gear, the 2nd gearset is already engaged except for the clutch (connection to the engine). The up-shift is an almost simultaneous disengaging of the first clutch and engaging of the second. If you ever drove a stick u can guess the timedifference.[/quote]

    I think I must see how it works. I have done many clutchs. I just think I need to read the replacement instructions. Like the auto-manual-clutchs I think all it is computer control hydralic clutch slave cylinder, I THINK...
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    Re: C7 Corvette could get a dual-clutch transmission

    A DCT would be a great tranny to start on the Vette, then hopefully it would spread to everything else in GM's line up!

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    Re: C7 Corvette could get a dual-clutch transmission

    Quote Originally Posted by boston boy
    what is a dual-clutch transmission. I don't understand DAD
    Here's the Wikipedia explanation:

    http://en.wikipedia.org/wiki/Twin-clutch_gearbox

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    Re: C7 Corvette could get a dual-clutch transmission

    Quote Originally Posted by BigAls87Z28
    Good to hear! Wonder how many gears? Could be an adaptation of the new 6 speed autos, or could the new trans be set up for more gears and a dual clutch system?
    Maybe an 8-speed?


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    Re: C7 Corvette could get a dual-clutch transmission

    Quote Originally Posted by BigAls87Z28
    Good to hear! Wonder how many gears? Could be an adaptation of the new 6 speed autos, or could the new trans be set up for more gears and a dual clutch system?
    i don't think a conventional auto can be adapted to a dual-clutch. dual clutch transmissions typically use helical or spur gears, like a manual, rather than planetary gears like an auto.
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    Re: C7 Corvette could get a dual-clutch transmission

    http://www.motorauthority.com/news/s...et-haldex-awd/

    Looks like the C7 could get AWD as well!

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    Re: C7 Corvette could get a dual-clutch transmission

    there really isn't much benefit to more than 6 gears (aside from marketing to naive consumers). the added physical complexity and increased friction negates any fuel economy benefits...besides, 6 gears are already enough to row through. a sequential tranny would make sense for 6 or 7 gears.

    the dsg will be light weight. the quick shifts help fuel economy, as well as acceleration and perceived shift smoothness. it's basically an automatic manual.

    gm will have a manually shifted automatic...with planetary gears and a normal clutch. the problem with starting with the automatic is that it weighs 90 lb more than the borg warner t56.

    using a cvt to keep the engine between peak torque and peak hp is ideal...but they can't take the corvette's power. f1 tried them out 15 years ago...however, compared with an 800 hp f1 car, the ls3 makes more torque!

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    Re: C7 Corvette could get a dual-clutch transmission

    Quote Originally Posted by chevy_lover
    http://www.motorauthority.com/news/s...et-haldex-awd/

    Looks like the C7 could get AWD as well!
    nix the awd. follow the links from that article. besides, the tranny is in the back. it'd be awkward to split power off the rear differential, send it to the front, and have a front dif (in the oil pan?).

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    Re: C7 Corvette could get a dual-clutch transmission

    how a dual clutch tranny works complete with pictures.

    http://auto.howstuffworks.com/dual-c...ansmission.htm

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    Re: C7 Corvette could get a dual-clutch transmission

    Quote Originally Posted by boston boy
    @boston boy

    This transmission design has two clutches. The first is connected to the gearsets 1,3,5. The second to 2,4,6. When in 1st gear, the 2nd gearset is already engaged except for the clutch (connection to the engine). The up-shift is an almost simultaneous disengaging of the first clutch and engaging of the second. If you ever drove a stick u can guess the timedifference.
    I think I must see how it works. I have done many clutchs. I just think I need to read the replacement instructions. Like the auto-manual-clutchs I think all it is computer control hydralic clutch slave cylinder, I THINK...[/quote]

    Nope, the clutch part looks very much like the lock-up part of a conventional automatic torque converter times two without the torque conversion parts. On the outside it also looks like a conventional torque converter.
    This type of transmission is VERY fast AND smooth at the same time.
    It very well could be equipped with planetary gears, but most manufacturers have choosen spur gears like in a conventional manual transmission.
    I think for heavy duty trucks the conventional torque converter automatic will still be available and the DCT for the lighter applications like cars, mini vans and small and medium sized SUVs, although they can be build for strength ( at a higher price).
    Go ahead and test drive an audi or VW, its really good, just don't buy these cars.

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    Re: C7 Corvette could get a dual-clutch transmission

    Wow! DCT 'vette in 2012. Evo will have it in 2008 and Skyline in 2009. GM's late to the party - again.

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