2006 automatic/ performance axle
Team Owner
Joined: Dec 2004
Posts: 25,455
Likes: 3
From: Damn Connecticut Yankee
I saw the GM graph that showed 2% slower 0-60 times for the A6 v. the A5/3.15 but it's not borne out by the math.
I wonder how they derived the graph?
2.56x6L80E = 10.31, 6.05, 3.92, 2.95, 2.18, 1.71
3.15 x4L65E = 9.64, 5.13, 3.15, 2.21
I wonder how they derived the graph?
2.56x6L80E = 10.31, 6.05, 3.92, 2.95, 2.18, 1.71
3.15 x4L65E = 9.64, 5.13, 3.15, 2.21
Last edited by ProfMoriarty; Aug 6, 2005 at 09:08 AM.
Drifting
Joined: Jun 2001
Posts: 1,270
Likes: 0
From: Prescott AZ
Originally Posted by ProfMoriarty
I saw the GM graph that showed 2% slower 0-60 times for the A6 v. the A4/3.15 but it's not borne out by the math.
I wonder how they derived the graph?
2.56x6L80E = 10.31, 6.05, 3.92, 2.95, 2.18, 1.71
3.15 x4L65E = 9.64, 5.13, 3.15, 2.21
I wonder how they derived the graph?
2.56x6L80E = 10.31, 6.05, 3.92, 2.95, 2.18, 1.71
3.15 x4L65E = 9.64, 5.13, 3.15, 2.21
Team Owner
Joined: Dec 2004
Posts: 25,455
Likes: 3
From: Damn Connecticut Yankee
Originally Posted by Curtis A. Franz
I too wonder where that came from. My guess would be that the A6 requires one more shift in the 0-60 dash. What do you think about that, Sir Doyle's evil one?
I'm still pissed off about Reichenbach Falls!
Racer
Joined: Jul 2004
Posts: 461
Likes: 0
From: NW Suburbs Illinois
Originally Posted by LS WON
I'm glad I got an 05 C-6 with 4 spd. auto which is a heavier duty version 4L65LEof a tried and true transmission with 3.15 gears. 
Last edited by TRJ; Aug 7, 2005 at 02:19 PM. Reason: Number correction..
Burning Brakes
Joined: Oct 1999
Posts: 790
Likes: 0
From: meraux louisiana
Goofy Graph
Originally Posted by ProfMoriarty
I saw the GM graph that showed 2% slower 0-60 times for the A6 v. the A5/3.15 but it's not borne out by the math.
I wonder how they derived the graph?
2.56x6L80E = 10.31, 6.05, 3.92, 2.95, 2.18, 1.71
3.15 x4L65E = 9.64, 5.13, 3.15, 2.21
I wonder how they derived the graph?
2.56x6L80E = 10.31, 6.05, 3.92, 2.95, 2.18, 1.71
3.15 x4L65E = 9.64, 5.13, 3.15, 2.21
I wondered too. This A6 may fly with the best if it is designed and programmed right
.Standard transmissions will become ever rarer in the future. Many young people can't even drive them anymore
.Even trucks have mostly automatics now
.
Le Mans Master
Joined: Mar 1999
Posts: 6,744
Likes: 1
From: delmont pa
Cruise-In I Veteran
Cruise-In II Veteran
Originally Posted by Curtis A. Franz
I too wonder where that came from. My guess would be that the A6 requires one more shift in the 0-60 dash. What do you think about that, Sir Doyle's evil one?
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Safety Car
Joined: Feb 2000
Posts: 4,977
Likes: 38
From: Massachusetts , USA,
with big Jim 
the 6 speed tranny is /will be an improvement over the A4,lower ratios out of the hole>>> you guys 
probably complained when the power glide was done away with in 67/68 for the 3 speed auto>>>..wait a minute you were on big wheels at the time, a 6 speed auto is in my future & if i need a 4 speed to prove im a man i will take my 66 B/B out for a spin my legs are tired but not my thumbs paddle shifters here I come 
Yahoooo & Woof 2 cents from the old dog>>>> QUOTE=Big Jimm]I think the new tranny is ABSOLUTELY EXCELLENT!! I like the new low - and high - ratios and think the paddle shift is just right! Having driven MANY stick shifts in the past, I'll bet that, with the operation of this new tranny, stick shift buyers in the future will dwindle fast.
And, that there will be a lot of 05 stick AND auto trade-ins to get the new A6.
Also - 1250 is a VERY fair price! (Unlike the chrome wheels @1995.)
Big Jimm
So. Fla.[/QUOTE]
Last edited by StrayDog; Aug 7, 2005 at 04:50 PM.
Burning Brakes
Joined: Oct 1999
Posts: 790
Likes: 0
From: meraux louisiana
Neat Presentation
Originally Posted by StrayDog
with big Jim the 6 speed tranny is /will be an improvement over the A4,lower ratios out of the hole>>> you guys probably complained when the power glide was done away with in 67/68 for the 3 speed auto>>>..wait a minute you were on big wheels at the time, a 6 speed auto is in my future & if i need a 4 speed to prove im a man i will take my 66 B/B out for a spin my legs are tired but not my thumbs paddle shifters here I come Yahoooo & Woof 2 cents from the old dog>>>> QUOTE=Big Jimm]I think the new tranny is ABSOLUTELY EXCELLENT!! I like the new low - and high - ratios and think the paddle shift is just right! Having driven MANY stick shifts in the past, I'll bet that, with the operation of this new tranny, stick shift buyers in the future will dwindle fast.
And, that there will be a lot of 05 stick AND auto trade-ins to get the new A6.
Also - 1250 is a VERY fair price! (Unlike the chrome wheels @1995.)
Big Jimm
So. Fla.
I love the presentation. Neato eye candy . But I too wonder why somebody would want less gears in an automatic. Fluid clutch and dynaflow way back when only had 1 gear , and they were terribly slow off the line
. 2 speed Powerglide might be great for the dragstrip where the power is awsome, but it was mighty feeble driving down Muholland Road .
Burning Brakes
Joined: Jun 2005
Posts: 787
Likes: 0
Originally Posted by 1966 327
I' m sure I'm alone but I'm sure glad I bought a Mag Red, A4 2005
I'm sure the A6 will be great but I am really happy with the performance of the A4 Z51 that I already own.
Drifting
Joined: Jun 2001
Posts: 1,270
Likes: 0
From: Prescott AZ
Originally Posted by clem zahrobsky
more parts,more weight,like a heavier flywheel, in the trans means more rotational mass which equals slower accelertion. that is why a THM 350 is quicker then a THM 400 at the drags. this is the reason that GM did not use a dual mass flywheel in the C-6s to quiet down the "gear rattle" problem found in the C-5 because it would cost .2 in the 0-60 times because of the extra weight
Hydra-Matic 6-Speed Automatic TransmissionsDelivering performance and fuel economy benefits
Overview:
Several 6-speed variants will be featured in GM vehicles worldwide.
The first 6-speed will debut in 2005 (applications to be announced at a later date)
New Technologies:
Clutch-to-clutch
Controls characterization
TEHCM – Transmission Electro/Hydraulic Controls Module
Shift-by-wire (ETRS)
Features:
Neutral idle
Automatic grade braking
Driver Shift Control (DSC)
Enhanced Performance Algorithm Shifting (PAS II)
Next-generation tow/haul mode
Benefits:
Fuel economy
Performance
Premium shift quality and driveability
Drifting
Joined: Jun 2001
Posts: 1,270
Likes: 0
From: Prescott AZ
clutch to clutch shifting
Here is a 2004 GM description of this "advance" to be used in the 6 speed transmission:
CLUTCH-TO-CLUTCH SHIFT CONTROL SYSTEM
This innovation consists of groundbreaking control logic and the hydraulic hardware necessary to control clutch-to-clutch transmissions with world-class shift quality. These methods enable five- and six-speed transmissions to be integrated with various engines and platform combinations with significantly reduced calibration effort. Included is FAST Learn, an algorithm that compensates for initial build variation, allowing the control logic to deliver excellent shift quality right out of the vehicle assembly plant and over the life of the transmission through adaptive learning. The control logic with reduced calibration effort minimizes development cost, time, and improves overall quality.
It makes it sound like the advantages are for manufacturing variations and a way to make the shifts consistent. Does that relate to better performance? Boy I don't know. Performance of course means "faster" to us Y body people.
CLUTCH-TO-CLUTCH SHIFT CONTROL SYSTEM
This innovation consists of groundbreaking control logic and the hydraulic hardware necessary to control clutch-to-clutch transmissions with world-class shift quality. These methods enable five- and six-speed transmissions to be integrated with various engines and platform combinations with significantly reduced calibration effort. Included is FAST Learn, an algorithm that compensates for initial build variation, allowing the control logic to deliver excellent shift quality right out of the vehicle assembly plant and over the life of the transmission through adaptive learning. The control logic with reduced calibration effort minimizes development cost, time, and improves overall quality.
It makes it sound like the advantages are for manufacturing variations and a way to make the shifts consistent. Does that relate to better performance? Boy I don't know. Performance of course means "faster" to us Y body people.
Le Mans Master
Joined: Aug 2004
Posts: 5,259
Likes: 16
From: Monroe Township New Jersey
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16
St. Jude donor in memory of jpee '14
Originally Posted by 1966 327
I' m sure I'm alone but I'm sure glad I bought a Mag Red, A4 2005
Same here but mine is LMB
Drifting
Joined: Jun 2001
Posts: 1,270
Likes: 0
From: Prescott AZ
More Clutch-to clutch info
this review of the dual input shaft and clutch-to clutch makes is sound like there are performance gains with a clutch-to-clutch transmissions.
Dual Input Clutch, Layshaft Automatic Transmission (DCT)
The DCT is basically two transmissions in one case, one with gears 1, 3, and 5 and one with gears 2, 4, and 6. Clutch-to-clutch shifting enables the transmission to shift under power, eliminating the torque interruption that is characteristic of many automated manual transmission systems. Like an automated manual system, the DCT uses engine control to optimize feel and has both automatic and manual (shifting) operation modes that can be selected at any time.
Benefits of this system include fuel economy as good as or better than a manual, maintaining the feel and function of an automatic, a layshaft configuration that permits flexibility in designing gear ratios for optimum fuel economy and performance of different vehicles, being well-suited to high power engine applications, and being well-suited for integration of electric motors for hybrid applications.
Dual Input Clutch, Layshaft Automatic Transmission (DCT)
The DCT is basically two transmissions in one case, one with gears 1, 3, and 5 and one with gears 2, 4, and 6. Clutch-to-clutch shifting enables the transmission to shift under power, eliminating the torque interruption that is characteristic of many automated manual transmission systems. Like an automated manual system, the DCT uses engine control to optimize feel and has both automatic and manual (shifting) operation modes that can be selected at any time.
Benefits of this system include fuel economy as good as or better than a manual, maintaining the feel and function of an automatic, a layshaft configuration that permits flexibility in designing gear ratios for optimum fuel economy and performance of different vehicles, being well-suited to high power engine applications, and being well-suited for integration of electric motors for hybrid applications.
Racer
Joined: Oct 2004
Posts: 407
Likes: 0
From: All Corvettes are RED! Oklahoma City, OK
The new A6 tranny sounds alot like the auto in the Audi TT released last year, same clutch to clutch tech. Read the review from Car and Driver:
http://www.caranddriver.com/article....&page_number=1
http://www.caranddriver.com/article....&page_number=1
Team Owner
Joined: Dec 2002
Posts: 32,074
Likes: 296
From: San Francisco CA
Please bear with me as I'm having computer problems I will look into this.
Originally Posted by TRJ
LS WON, In an earlier post by someone, they read an excerpt from an article in the Corvette Quarterly "Special Edition" on the "05 C6 Auto." What was said was that the '05 A4 Auto. Trans. in this heavier duty version, was capable of handling up to 620 lbs. ft. of torque. I personally have not read the article, but would like to. Would anyone be able to scan & post the article, or even type out the exact wording from the article?? I think that they said it was on page 120 of the "Special Edition" of the magazine. Thanks much...
Race Director
Joined: Oct 2004
Posts: 10,089
Likes: 14
Originally Posted by tbob
The new A6 tranny sounds alot like the auto in the Audi TT released last year, same clutch to clutch tech. Read the review from Car and Driver:
http://www.caranddriver.com/article....&page_number=1
http://www.caranddriver.com/article....&page_number=1