Will the C8 need a Range device?
Drifting
Joined: Jul 2019
Posts: 1,766
Likes: 1,244
From: Central Texas
St. Jude Donor '21
Safety Car
Joined: Jul 2013
Posts: 4,408
Likes: 3,485
From: Granada Hills CA
Not sure why everyone is trying to apply solutions for an automatic to a DCT. A DCT is not an automatic, it's a manual that will shift for you. There is no torque converter or a ton of other components in an automatic. I have already told my wife there will be a learning curve on the feel and how a DCT works, it will not have the same feel as an automatic because it isn't one.
Last edited by Bob Paris; Aug 11, 2019 at 01:44 PM.
Melting Slicks
Joined: Jul 2011
Posts: 2,055
Likes: 864
From: So Cal
DCTs and automatics are simply not the same beasts. DCTs can in some ways be programmed to mimic an auto but that doesn’t mean that a DCT is for all intents and purposes an auto. The C8 DCT appears to conceptually be a double shafted manual transmission with two clutches that are interchangeably activated optimally by a robotic computer. In that respect, it can accomplish things that neither an automatic or a true manual clutched tranny can.
If, as some have related, the C8 DCT can automatically disconnect the clutches when the brake is applied while sitting at a stop light, then wear issues associated with creep mode would be significantly minimized and the occasional jerky DCT issues coming off a stop would also be minimized or eliminated when a clutch engages into creep mode as the brake pedal is released.
Also, keep in mind that it appears the C8 programming can be modified over WiFi perhaps similarly to what Tesla does. If this is indeed the case, and it applies to DCT programming updates, this really is a whole new ballgame.
If, as some have related, the C8 DCT can automatically disconnect the clutches when the brake is applied while sitting at a stop light, then wear issues associated with creep mode would be significantly minimized and the occasional jerky DCT issues coming off a stop would also be minimized or eliminated when a clutch engages into creep mode as the brake pedal is released.
Also, keep in mind that it appears the C8 programming can be modified over WiFi perhaps similarly to what Tesla does. If this is indeed the case, and it applies to DCT programming updates, this really is a whole new ballgame.
Last edited by B747VET; Aug 11, 2019 at 03:10 PM.
Race Director
Joined: Aug 2019
Posts: 13,719
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From: 3rd Rock from Sol
Early Gallardo with E-gear trans was supposed to last for +80k miles. Actual life of the clutches was 4000-30,000, with many below 15k miles. Maybe GM has it sorted out right, maybe they will last 80k miles or more, maybe the slipping between modes will not affect the life of the clutches. As there is no alternative, I can understand why there will be an offering to defeat the V4 mode, due to the extra clutch wear, and the fact that some folks just don't like driving a V4 Corvette.
Safety Car
Joined: Jul 2019
Posts: 4,079
Likes: 2,414
From: Florida
Early Gallardo with E-gear trans was supposed to last for +80k miles. Actual life of the clutches was 4000-30,000, with many below 15k miles. Maybe GM has it sorted out right, maybe they will last 80k miles or more, maybe the slipping between modes will not affect the life of the clutches. As there is no alternative, I can understand why there will be an offering to defeat the V4 mode, due to the extra clutch wear, and the fact that some folks just don't like driving a V4 Corvette.
Mike
Race Director
Joined: Oct 2011
Posts: 15,055
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From: Holly Springs NC
St. Jude Donor '16-'17,'22,'24
Not sure why everyone is trying to apply solutions for an automatic to a DCT. A DCT is not an automatic, it's a manual that will shift for you. There is no torque converter or a ton of other components in an automatic. I have already told my wife there will be a learning curve on the feel and how a DCT works, it will not have the same feel as an automatic because it isn't one.
Whew!! That's a relief........Oh,..... wait a minute.
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Burning Brakes
Joined: Jan 2014
Posts: 1,123
Likes: 228
From: Colorado Springs, CO/Augusta,GA Colorado
Wow, people act like this is the first DCT ever invented.....I would hope that GM has learned from other manufacturers and improved any shortfallings. I wouldn't go out and buy a device before knowing if I need it or not. In 6-7 months when you get the car, drive it and then decide if you want it to behave differently than GM built it.
Race Director
Joined: Aug 2019
Posts: 13,719
Likes: 98
From: 3rd Rock from Sol
It was framed as an early life failure comparison(C8 is Corvette first automated clutch operation), not a technology comparison. I'm sorry you weren't able to gather that, and went a different direction.
Safety Car
Joined: Jul 2019
Posts: 4,079
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From: Florida
Mike
Race Director
Joined: Aug 2019
Posts: 13,719
Likes: 98
From: 3rd Rock from Sol
Have a nice day - good bye.
Safety Car
Joined: Jul 2019
Posts: 4,079
Likes: 2,414
From: Florida
It may not to you, it might to others, like me. BTW, the very first sentence of my post which you quoted was the estimate from Lamborghini of the clutch life expectancy circa 2004. Sadly again, you continue to frame the discussion about the technology of the two, and not the reason why some here are concerned about the DCT, and how it will perform with the V8-V4 transition. The very first thread mentions slip, and several after that.
Have a nice day - good bye.
Have a nice day - good bye.
