Anyone changed their rear gears?
Instructor
Joined: Dec 2013
Posts: 248
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Pro
Joined: Jan 2013
Posts: 639
Likes: 17
From: DFW TX
Instructor
Joined: Dec 2013
Posts: 248
Likes: 0
It doesn't mention Limited Slip Differential on the Big Window Sticker that came on the car so I didn't think I had it. What is the difference between what I have and e-LSD?
Wanna laugh?
I asked my dealer why I had no Limited Slip and he called me back to say it was replaced by the Stabilitrack. LOL! Two completely different things.
Wanna laugh?
I asked my dealer why I had no Limited Slip and he called me back to say it was replaced by the Stabilitrack. LOL! Two completely different things.
Pro
Joined: Jan 2013
Posts: 639
Likes: 17
From: DFW TX
It doesn't mention Limited Slip Differential on the Big Window Sticker that came on the car so I didn't think I had it. What is the difference between what I have and e-LSD?
Wanna laugh?
I asked my dealer why I had no Limited Slip and he called me back to say it was replaced by the Stabilitrack. LOL! Two completely different things.
Wanna laugh?
I asked my dealer why I had no Limited Slip and he called me back to say it was replaced by the Stabilitrack. LOL! Two completely different things.
Here is an explanation of the e-LSD
A smart electronic limited-slip differential (eLSD) is included in the Z51 Performance Package and continuously makes the most of the torque split between the rear wheels. The system features a hydraulically actuated clutch that can infinitely vary clutch engagement and can respond from open to full engagement in tenths of a second. It shifts torque based on a unique algorithm which factors in vehicle speed, steering input and throttle position to improve steering feel, handling balance and traction.
The eLSD is fully integrated with StabiliTrak and Performance Traction Management systems. Its calibrations vary among three modes, based on the Drive Mode Selector setting:
Mode 1 is the default setting for normal driving and emphasizes vehicle stability
Mode 2 is engaged when electronic stability control is turned off in the Sport or Track Driver Modes. This calibration enables more nimble turn-in and traction while accelerating out of a corner
Mode 3 is automatically selected when Performance Traction Management is engaged. This calibration has the same function as Mode 2, but is fine-tuned to work with Performance Traction Management.
Thread Starter
Pro
Joined: Oct 2004
Posts: 546
Likes: 1
From: CA
Your LSD is a normal mechanical LSD.
Here is an explanation of the e-LSD
A smart electronic limited-slip differential (eLSD) is included in the Z51 Performance Package and continuously makes the most of the torque split between the rear wheels. The system features a hydraulically actuated clutch that can infinitely vary clutch engagement and can respond from open to full engagement in tenths of a second. It shifts torque based on a unique algorithm which factors in vehicle speed, steering input and throttle position to improve steering feel, handling balance and traction.
The eLSD is fully integrated with StabiliTrak and Performance Traction Management systems. Its calibrations vary among three modes, based on the Drive Mode Selector setting:
Mode 1 is the default setting for normal driving and emphasizes vehicle stability
Mode 2 is engaged when electronic stability control is turned off in the Sport or Track Driver Modes. This calibration enables more nimble turn-in and traction while accelerating out of a corner
Mode 3 is automatically selected when Performance Traction Management is engaged. This calibration has the same function as Mode 2, but is fine-tuned to work with Performance Traction Management.
Here is an explanation of the e-LSD
A smart electronic limited-slip differential (eLSD) is included in the Z51 Performance Package and continuously makes the most of the torque split between the rear wheels. The system features a hydraulically actuated clutch that can infinitely vary clutch engagement and can respond from open to full engagement in tenths of a second. It shifts torque based on a unique algorithm which factors in vehicle speed, steering input and throttle position to improve steering feel, handling balance and traction.
The eLSD is fully integrated with StabiliTrak and Performance Traction Management systems. Its calibrations vary among three modes, based on the Drive Mode Selector setting:
Mode 1 is the default setting for normal driving and emphasizes vehicle stability
Mode 2 is engaged when electronic stability control is turned off in the Sport or Track Driver Modes. This calibration enables more nimble turn-in and traction while accelerating out of a corner
Mode 3 is automatically selected when Performance Traction Management is engaged. This calibration has the same function as Mode 2, but is fine-tuned to work with Performance Traction Management.
Pat
Team Owner
Joined: Feb 2013
Posts: 22,598
Likes: 14,556
The Z51 doesn't have a different rear gear ratio. The transmission is geared more steeply in 1-3 and 5th. The base car, as mentioned above, still has a traditional limited slip. The eLSD just adds control of the actuation of it all... think of it like variable cam timing vs. picking a fixed cam profile.
Thread Starter
Pro
Joined: Oct 2004
Posts: 546
Likes: 1
From: CA
The Z51 doesn't have a different rear gear ratio. The transmission is geared more steeply in 1-3 and 5th. The base car, as mentioned above, still has a traditional limited slip. The eLSD just adds control of the actuation of it all... think of it like variable cam timing vs. picking a fixed cam profile.
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Pro
Joined: Jan 2013
Posts: 639
Likes: 17
From: DFW TX
The Z51 doesn't have a different rear gear ratio. The transmission is geared more steeply in 1-3 and 5th. The base car, as mentioned above, still has a traditional limited slip. The eLSD just adds control of the actuation of it all... think of it like variable cam timing vs. picking a fixed cam profile.
Burning Brakes
Joined: Dec 2013
Posts: 1,051
Likes: 302
Well that depends!
Base C7 manual rear ratio: 3.42
Base C7 auto rear ratio: 2.56
Z51 C7 manual rear ratio: 3.42
Z51 C7 auto rear ratio: 2.73
So only the auto car's rear ratios are different on the Z51, with the manual rear ratios being the same on both cars. The auto gear ratios are the same on both cars, but the Z5's manual gearbox ratios are all different from the ones on the base car except for 4th gear which is straight 1.00:1
Base C7 manual rear ratio: 3.42
Base C7 auto rear ratio: 2.56
Z51 C7 manual rear ratio: 3.42
Z51 C7 auto rear ratio: 2.73
So only the auto car's rear ratios are different on the Z51, with the manual rear ratios being the same on both cars. The auto gear ratios are the same on both cars, but the Z5's manual gearbox ratios are all different from the ones on the base car except for 4th gear which is straight 1.00:1
Drifting
Joined: Jan 2005
Posts: 1,827
Likes: 301
From: Tucson Arizona
St. Jude Donor '08
I don't think that answers my question. I used to have a 2008 Z51 C6 with the same transmission ratios as in the C7 Z51. I installed a steeper rear gear in the C6 diff and I loved the way the car drove after that. If I buy a C7, I'm interested in knowing if I can do the same thing? It sounds like nobody has done this yet.
Race Director
Joined: Dec 2006
Posts: 12,393
Likes: 2,911
From: Fort Worth, Texas
The Z51 doesn't have a different rear gear ratio. The transmission is geared more steeply in 1-3 and 5th. The base car, as mentioned above, still has a traditional limited slip. The eLSD just adds control of the actuation of it all... think of it like variable cam timing vs. picking a fixed cam profile.
http://www.gmhightechperformance.com.../photo_02.html
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
If RPM does not have any answers you can check with DTE.
I think the M7 does come in two versions: base & Z51. The Z51 should have performance ratios just as the C6 generation
I think the M7 does come in two versions: base & Z51. The Z51 should have performance ratios just as the C6 generation
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
Just for clarification 5th is actually taller on the z51 vs base M7 trans, 6/7 are steeper along with 1-3...
http://www.gmhightechperformance.com.../photo_02.html
http://www.gmhightechperformance.com.../photo_02.html
I just typed too slow 