Transmissions
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1st Gear
Joined: Mar 2013
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Transmissions
I need more info on the C7 transmissions. With the rev matching on the manual, it sounds as though you can shift without using the clutch. Is this true? On the automatic, will it automatically up shift at a certain RPM evan if it is in manual mode? The Camaro is that way and I don't like it at all. Is the auto new as compared to the C6? I guess it must be as they only used 2 bolts from the C6.
On the Z51 package, has any one heard what the gear ratios are?
On the Z51 package, has any one heard what the gear ratios are?
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From: DFW Area TX
... it sounds as though you can shift without using the clutch. Is this true? I don't think so.
On the automatic, will it automatically up shift at a certain RPM ... The current A6 on the C6 does not, so probably no.
Is the auto new as compared to the C6? Same tranny with some minor tweaks.
... as they only used 2 bolts from the C6. Allegedly the carryover parts are the roof latch and the cabin air filter.
On the automatic, will it automatically up shift at a certain RPM ... The current A6 on the C6 does not, so probably no.
Is the auto new as compared to the C6? Same tranny with some minor tweaks.
... as they only used 2 bolts from the C6. Allegedly the carryover parts are the roof latch and the cabin air filter.
Safety Car
Joined: Feb 2013
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All the rev match feature does is blip the throttle to simulate heel-toe shifting. It would be very cool if you didn't need to use the clutch but those transmissions are more commonly known as DCTs 
and we, unfortunately, don't have that option.
and we, unfortunately, don't have that option.
Burning Brakes
Joined: Oct 2004
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From: Ellicott City MD
) then you don't need a clutch and it should move from one gear to the next sans clutch (i.e. there would be no need to decouple the engine from the transmission because they would be both moving at the same speed). Don't know if the new MT can do that, I sure as hell cannot!
Last edited by dmporter31; Mar 11, 2013 at 01:48 PM.
Safety Car
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DCTs have clutches, just computer controlled. Theoretically, if you have the speeds perfectly rev matched (hence the term ) then you don't need a clutch and it should move from one gear to the next sans clutch (i.e. there would be no need to decouple the engine from the transmission because they would be both moving at the same speed). Don't know if the new MT can do that, I sure as hell cannot!
) then you don't need a clutch and it should move from one gear to the next sans clutch (i.e. there would be no need to decouple the engine from the transmission because they would be both moving at the same speed). Don't know if the new MT can do that, I sure as hell cannot!The rev match feature does not, to my knowledge, negate the need to use the clutch. Other cars have this feature and you still have a need for a left foot
Burning Brakes
Joined: Oct 2004
Posts: 759
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From: Ellicott City MD
It would be awesome if you could just bang the shifter and skip the manual clutch work altogether but then you'd be using a X-Trac
Last edited by dmporter31; Mar 11, 2013 at 02:19 PM.
Safety Car
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From: IL / FL .
Still waiting to hear all the ratios of the base 7-speed manual and the Z51 7-speed manual. A while ago someone said the ratios are the same as the 6-speeds were but with a tall 7th gear added. Nobody verified that. Has anybody found the ratios, I couldn't?
Team Owner
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From: Springfield MO
base C7 has the same 1st thru 6th as the base C6/Z06 but with a .42:1 7th gear, and the Z51 has the same ratios 1st thru 7th as the C6 Z51/GS but with a .48:1 7th gear.
No performance change in the transmissions, just a tall 7th gear for highway gas mileage.
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Safety Car
Joined: Aug 2004
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From: IL / FL .
TR6070 has the same ratios as the TR6060.
base C7 has the same 1st thru 6th as the base C6/Z06 but with a .42:1 7th gear, and the Z51 has the same ratios 1st thru 7th as the C6 Z51/GS but with a .48:1 7th gear.
No performance change in the transmissions, just a tall 7th gear for highway gas mileage.
base C7 has the same 1st thru 6th as the base C6/Z06 but with a .42:1 7th gear, and the Z51 has the same ratios 1st thru 7th as the C6 Z51/GS but with a .48:1 7th gear.
No performance change in the transmissions, just a tall 7th gear for highway gas mileage.
Now I can put them all down in order:Base C7:
1st - 2.66
2nd - 1.78
3rd - 1.30
4th - 1.00
5th - 0.74
6th - 0.50
7th - 0.42
with Z51:
1st - 2.97
2nd - 2.07
3rd - 1.42
4th - 1.00
5th - 0.71
6th - 0.56
7th - 0.48
In past years cars with the aggressive 2.97 first gear have always felt noticably livelier at lower speeds than base cars with the taller 2.66 gearing... Except C6 Z06s. With all that extra torque the 427s seem to feel plenty strong even with the taller gearing. Now the Base C7 has lots more torque, supposedly comparable to the 427 below 4000 rpm. It will be interesting to see if the C7 needs the aggressive gearing option as much as the C6 did.
The 2008-up TR6060 with 2.66 1st (MM6) has a maximum torque rating of 500 ft lb. The TR6060 with 2.97 1st (MZ6) has a maximum torque rating of 428 ft lbs. Safe to say the C7 Z51 TR6070 will see some extra beefing up/hardening.
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Last edited by ZL-1; Mar 11, 2013 at 09:43 PM.
Safety Car
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Yes unless you enjoy doing it yourself... some do... some don't. If you want to do it yourself, you turn off the rev match feature.
Racer
Joined: Nov 2005
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From: STL
In my G8 the car will not shift up in manual mode unless you tell it to. It will bang off the limiter all day long in manual mode. It will only shift down to prevent a stall.
The auto transmission in the Corvette is the same that's in the G8 and the Camaro AFAIK.