Difference in gears between z51 and stock c6 ?

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01-17-2019, 07:04 PM

XPLOSVC6

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Difference in gears between z51 and stock c6 ?

Is there a difference between z51 and base model gears and if so what are they ? I think my z51 had 3:42.1
does that sound right ?

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01-17-2019, 07:16 PM

rkj427

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Quote:

Originally Posted by XPLOSVC6

Is there a difference between z51 and base model gears and if so what are they ? I think my z51 had 3:42.1
does that sound right ?

Model year?

Manual or automatic transmission?

Transmission internal gear ratios?

Rear differential gear ratios?

There are some differences in all the above between a base car and Z51 optioned vehicle.

Last edited by rkj427; 01-17-2019 at 07:17 PM.

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01-17-2019, 07:47 PM

farmington

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No difference. Manuals all got 3.42
A6 got 2.56 but Z51 A6 got 2.73.

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01-17-2019, 08:35 PM

Oh Boy

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01-17-2019, 08:58 PM

Mark Halverson

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01-17-2019, 09:13 PM

C6KWJ

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The difference is transmission ratios in Z51 transmission vs base is steeper ratio.

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01-18-2019, 12:01 AM

HOXXOH

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Quote:

Originally Posted by Oh Boy

I agree with the chart unless it was a 2005 car with a standard 2.73 axle or an optional 3.15 axle on the 4 speed trans. And a base A6 could also have the 2.73 axle. It was not a GS exclusive.