C7 to offer 8 speed auto & 7 speed manual
11-22-2012, 06:45 PM
#41
Team Owner
Someone mention a couple of days ago that ZF would be supplying the 7 speed transmission(word from the ZF factory?). GM does not build the current 6 speed manual transmission, but instead purchases them from Tremec. Since GM has purchased transmissions in the past from ZF, it makes sense that they would purchase from them again, especially, if Tremec can not supply a 7 speed transmission for the C7.
11-22-2012, 06:51 PM
#42
Burning Brakes
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Someone mention a couple of days ago that ZF would be supplying the 7 speed transmission(word from the ZF factory?). GM does not build the current 6 speed manual transmission, but instead purchases them from Tremec. Since GM has purchased transmissions in the past from ZF, it makes sense that they would purchase from them again, especially, if Tremec can not supply a 7 speed transmission for the C7.
11-22-2012, 06:52 PM
#43
Team Owner
Only problem I see is that the ZF 7 speed is reported to weigh around 240 lbs. The existing 6 speed weighs around 125-130 lbs. That's a lot of weight increase for a car that GM is trying to cut the weight by a significant amount according to the GM press releases. The existing 6 speed auto weighs around 250 lbs.
BTW, has GM officially confirmed that the C7 will have a 8 speed auto transmission. All I've seen is "hints" to one being available by the press.
Last edited by JoesC5; 11-22-2012 at 06:56 PM.
11-22-2012, 07:57 PM
#44
Burning Brakes
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Only problem I see is that the ZF 7 speed is reported to weigh around 240 lbs. The existing 6 speed weighs around 125-130 lbs. That's a lot of weight increase for a car that GM is trying to cut the weight by a significant amount according to the GM press releases. The existing 6 speed auto weighs around 250 lbs.
BTW, has GM officially confirmed that the C7 will have a 8 speed auto transmission. All I've seen is "hints" to one being available by the press.
BTW, has GM officially confirmed that the C7 will have a 8 speed auto transmission. All I've seen is "hints" to one being available by the press.
11-22-2012, 08:11 PM
#45
Melting Slicks
Only problem I see is that the ZF 7 speed is reported to weigh around 240 lbs. The existing 6 speed weighs around 125-130 lbs. That's a lot of weight increase for a car that GM is trying to cut the weight by a significant amount according to the GM press releases. The existing 6 speed auto weighs around 250 lbs.
BTW, has GM officially confirmed that the C7 will have a 8 speed auto transmission. All I've seen is "hints" to one being available by the press.
BTW, has GM officially confirmed that the C7 will have a 8 speed auto transmission. All I've seen is "hints" to one being available by the press.
11-22-2012, 08:58 PM
#46
Drifting
11-22-2012, 10:08 PM
#47
Race Director
When the c7 gets the 8 speed automatic I bet it's awesome. I've been driving manuals for over 35 years yet this new transmission will be awesome.
The technology is just getting too good
The technology is just getting too good
11-22-2012, 10:27 PM
#48
Melting Slicks
There's never been any doubt that aids are a difference maker, it's just that the better you are, the less difference they make. Watch the guy in this video. We can only dream to have talent like this, and that goes for Justin too.
http://www.youtube.com/watch?v=8By2AEsGAhU
http://www.youtube.com/watch?v=8By2AEsGAhU
11-23-2012, 03:26 AM
#49
Team Owner
I think the current 6 speed automatic weighs roughly 228 pounds.
11-23-2012, 06:37 AM
#50
Team Owner
that could be true, 228 pounds, so possible that a ZF manual at 240 pounds could out weigh the automatic.
It would be great that is someone with a new base C6 coupe with a manual transmission would post their GVWR(located on drivers door sticker) and then someone with a new base C6 coupe with the A6 would post their GVWR. Then we could see what the net weight increase of the auto transmission is over the manual transmission.
It would be great that is someone with a new base C6 coupe with a manual transmission would post their GVWR(located on drivers door sticker) and then someone with a new base C6 coupe with the A6 would post their GVWR. Then we could see what the net weight increase of the auto transmission is over the manual transmission.
11-23-2012, 12:15 PM
#53
Fair enough. I totally get this.
I remember people wanted that 93 F-body Borg Warner T56 because of the gearing over the Tremec T56 that came in the later years. They were stronger and geared like the MN12s. One single year and now those transmissions are gold to the SBC and LT1 guys.
With the C6s, some people actually preferred the 4L60 in 2005 because they were better for drag racing. I don't care about drag racing, to be honest, so not having the 6 speed auto would suck to me. Lesser of 2 evils?
And you're right, people b!tch and complain one way or another when there's a variance in anything when it comes to Corvettes. It's a little surprising what people expect out of a $50K car.
I remember people wanted that 93 F-body Borg Warner T56 because of the gearing over the Tremec T56 that came in the later years. They were stronger and geared like the MN12s. One single year and now those transmissions are gold to the SBC and LT1 guys.
With the C6s, some people actually preferred the 4L60 in 2005 because they were better for drag racing. I don't care about drag racing, to be honest, so not having the 6 speed auto would suck to me. Lesser of 2 evils?
And you're right, people b!tch and complain one way or another when there's a variance in anything when it comes to Corvettes. It's a little surprising what people expect out of a $50K car.
11-23-2012, 12:23 PM
#54
Looks like GM has alot of business in China?
https://www.youtube.com/watch?v=Lvl5Gan69Wo
https://www.youtube.com/watch?v=Lvl5Gan69Wo
11-23-2012, 08:49 PM
#55
Le Mans Master
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It's still a 4 speed carried over from old tech. You got my point, though, no? Or should I rewrite that whole thing again substituting the 0 for a 5?
11-23-2012, 09:01 PM
#56
Le Mans Master
What that does that have to do with this discussion? Take this sort of "stuff" to PRC or Off Topic where it belongs. BTW, many car companies are in China...that's where the money is because stupid people in the US have given them all of our money for their junk. Even the Chinese prefer "Made in the USA" and they don't really like Japanese cars. They love Buicks and Cadillacs, they think they are the best. Face it, we're in a global economy and GM is out there competing on a global scale...why is that a bad thing? Do you want them to fail and force the taxpayers to eat the loan?
Last edited by DRLC5; 11-23-2012 at 09:06 PM.
11-23-2012, 11:42 PM
#57
11-24-2012, 05:58 AM
#58
Race Director
Seems the new programing GM has prepared makes the DCT an also ran os so says GM.
It'll be interesting to see if GM has been able to accomplish this goal. I really wanted a DCT transmission in my next sports car.."as I've been driving manuals for 35 years and have been hearing how great the DCT is...
Not too happy no DCT but I'm willing to listen an try the c7 options by year 3 I'll buy something. I'd rather it be a corvette and not a 911s which has for the first time ever caught my eye.....hope the DCT corvette happens and I keep an open mind to gms offering.
Not sure I'll do 40 years of driving manuals so I hope GM has something of interest to offer.
I want the direct drive feel of the manual both up and down the gears...no mushy slow downshifts and awkward slow upshifts DCT is like driving a manual with no pedal..period...GM needs to offer that sensation or just buy a DCT
It'll be interesting to see if GM has been able to accomplish this goal. I really wanted a DCT transmission in my next sports car.."as I've been driving manuals for 35 years and have been hearing how great the DCT is...
Not too happy no DCT but I'm willing to listen an try the c7 options by year 3 I'll buy something. I'd rather it be a corvette and not a 911s which has for the first time ever caught my eye.....hope the DCT corvette happens and I keep an open mind to gms offering.
Not sure I'll do 40 years of driving manuals so I hope GM has something of interest to offer.
I want the direct drive feel of the manual both up and down the gears...no mushy slow downshifts and awkward slow upshifts DCT is like driving a manual with no pedal..period...GM needs to offer that sensation or just buy a DCT
11-24-2012, 06:18 AM
#59
Le Mans Master
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Seems the new programing GM has prepared makes the DCT an also ran os so says GM.
It'll be interesting to see if GM has been able to accomplish this goal. I really wanted a DCT transmission in my next sports car.."as I've been driving manuals for 35 years and have been hearing how great the DCT is...
Not too happy no DCT but I'm willing to listen an try the c7 options by year 3 I'll buy something. I'd rather it be a corvette and not a 911s which has for the first time ever caught my eye.....hope the DCT corvette happens and I keep an open mind to gms offering.
Not sure I'll do 40 years of driving manuals so I hope GM has something of interest to offer.
I want the direct drive feel of the manual both up and down the gears...no mushy slow downshifts and awkward slow upshifts DCT is like driving a manual with no pedal..period...GM needs to offer that sensation or just buy a DCT
It'll be interesting to see if GM has been able to accomplish this goal. I really wanted a DCT transmission in my next sports car.."as I've been driving manuals for 35 years and have been hearing how great the DCT is...
Not too happy no DCT but I'm willing to listen an try the c7 options by year 3 I'll buy something. I'd rather it be a corvette and not a 911s which has for the first time ever caught my eye.....hope the DCT corvette happens and I keep an open mind to gms offering.
Not sure I'll do 40 years of driving manuals so I hope GM has something of interest to offer.
I want the direct drive feel of the manual both up and down the gears...no mushy slow downshifts and awkward slow upshifts DCT is like driving a manual with no pedal..period...GM needs to offer that sensation or just buy a DCT
If GM had to pick AFM or DCT, you can safely put your money on AFM.
11-24-2012, 02:54 PM
#60
Burning Brakes
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I wouldn't say quite that..dry clutch DCTs shift from 30ms to 200ms depending on which gear and situation, much faster than wet clutch DCT.
The new programing in the GM 6 speed auto reduce the shift time from 1st to 2nd from 350ms to 120ms.. and then 2nd to 3rd from 400ms to 200ms and higher gears get a little longer each step up. So it now shifts from 120ms to about 400ms depending on gears. So it has been made a better bang for the buck but not necessarily as good. But may have made wet clutch DCT, like in the Nissan GTR which shifts at about 200ms, not such a big deal.
