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Z51 package and performance gear

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Old Aug 11, 2005 | 01:11 AM
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From: valrico fl
St. Jude Donor '05
Default Z51 package and performance gear

Was thinking of buying a c6 vert with z51 and was wondering if that package included the 3.15 gears.
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Old Aug 11, 2005 | 01:15 AM
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Originally Posted by golfman
Was thinking of buying a c6 vert with z51 and was wondering if that package included the 3.15 gears.
Only if it's a 2005 automatic...manuals come with 3.42s (both Z51 and non Z51) and 2006 autos only come with a 2.56 gear, no 3.15 available Z51 or otherwise.
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Old Aug 11, 2005 | 07:46 AM
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From: valrico fl
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It is a auto so 3.15 gears. I guess the 1/4 mile difference between the 3.15 and 3.42 gears in the 6 speed is about .13 seconds. Does that sound about right given same car and driver. Same track conditions also.
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Old Aug 11, 2005 | 11:09 AM
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From: Offical CFOT MustangChick Texas
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Originally Posted by golfman
It is a auto so 3.15 gears. I guess the 1/4 mile difference between the 3.15 and 3.42 gears in the 6 speed is about .13 seconds. Does that sound about right given same car and driver. Same track conditions also.

there is no 3.15/3.42 in 6 speed cars. the 3.15 is ONLY available as a rear end gear ratio in two cars...

2005 A4 w/ performance axle option
2005 A4 w/Z51 option

....that's it.

*ALL* 6 speed cars have 3.42 rear gears. the Z51 cars simply get lower ratios in the first three gears (1 - 3) of the 6 Speed transmission. beginning in 2006, the new Auto will be the A6 and then ALL auto transmission cars will get the 2.56 ratio. there won't be a "performance axle" option for autos OR any difference in the rear ratio for auto/Z51 cars.

Clear?
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Old Aug 11, 2005 | 12:59 PM
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St. Jude Donor '07
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*ALL* 6 speed cars have 3.42 rear gears. the Z51 cars simply get lower ratios in the first three gears (1 - 3) of the 6 Speed transmission.
Clear? [/QUOTE]

The gears in the Z51 M6 all have a lower ratio, except 4th and 5th.
Std/Z51

1st 2.66/2.97
2nd 1.78/2.07
3rd 1.30/1.43
4th 1.00/1.00
5th 0.074/0.071
6th 0.050/0.057
Rev 2.90/3.28
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Old Aug 11, 2005 | 01:27 PM
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Originally Posted by Violet
there is no 3.15/3.42 in 6 speed cars. the 3.15 is ONLY available as a rear end gear ratio in two cars...
I think he may have meant 'the 3.15 A4 versus the 3.42 M6' when he wrote that but maybe not.
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Old Aug 12, 2005 | 04:21 PM
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From: valrico fl
St. Jude Donor '05
Default that is exactly what I meant

I was not talking about the A6 transmission. That is available in 06. As far as the gears in the 6 speed manual trans aren't they the same as prior years even in the Z51 package. The only tremac trans that is different to my knowledge was the Z06 trans in 02-04.

Last edited by golfman; Aug 12, 2005 at 04:23 PM.
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Old Aug 12, 2005 | 04:51 PM
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Originally Posted by golfman
As far as the gears in the 6 speed manual trans aren't they the same as prior years even in the Z51 package. The only tremac trans that is different to my knowledge was the Z06 trans in 02-04.
The gears in the base C6s 6 speed manual are the same as the gears in all 'non Z06' C5 manual transmissions....the gearing in the C6s Z51 6 speed is the same as the gearing in the C5 Z06 (2001-2004) trans.
All 6 speed manuals come with 3.42 rear axle ratios.
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