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Jul 1, 2015 | 07:01 AM

Cee7

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Newbie?

My window sticker says my car has 3.42 rear gear....is that possible with 8spd auto? Dealer manual says not in auto....

Jul 1, 2015 | 07:02 AM

Cee7

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Quote:

Originally Posted by Cee7

My window sticker says my car has 3.42 rear gear....is that possible with 8spd auto? Dealer manual says not in auto....

Is window sticker kinda like generic thing or could it b true?

Jul 1, 2015 | 09:31 AM

Sir Nuke

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Joined: Feb 2015

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From: West Columbia Texas

Quote:

Originally Posted by Cee7

Is window sticker kinda like generic thing or could it b true?

YES....sort of......it lists all the STANDARD equipment (stii that EVERYONE gets, i.e. manual transmission)...... then if you look closely at your sticker....it also shows that transmission as a option, the A8.

Jul 1, 2015 | 09:39 AM

Cee7

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I kinda figured it was like a generic thing......so no 3.42....rats

Jul 1, 2015 | 09:41 AM

W88fixer

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From: Texas

Wow, if that were actually done, taking a C7 with A8 and changing the axle ratio to 3.42, a 41% increase in gearing? Smoking the tires through 3rd gear??? Don

Jul 1, 2015 | 09:45 AM

Red C8 of Jax

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From: Jacksonville FL

Think the A8 C-7 has 2.41

Jul 1, 2015 | 02:22 PM

duanepillar

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Joined: Apr 2014

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From: Oshkosh WI

My 2015 Z51 A8 has a 2.73 according to the build sheet.

Jul 1, 2015 | 05:37 PM

Red C8 of Jax

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From: Jacksonville FL

Quote:

Originally Posted by duanepillar

My 2015 Z51 A8 has a 2.73 according to the build sheet.

The Base Stingray has 2.41.

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Jul 1, 2015 | 06:28 PM

Czarvette

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From: Rain Festival Headquarters, Upstate NY

Quote:

Originally Posted by W88fixer

Wow, if that were actually done, taking a C7 with A8 and changing the axle ratio to 3.42, a 41% increase in gearing? Smoking the tires through 3rd gear??? Don

If you could do it, you could probably pull stumps out of the back yard, too.

Turns out that the M7 with 3.42 rear end actually is taller (lower total gear ratio, engine to wheels) than A8 with 2.41 rear end.

gear M7 total A8 total
1 2.66 9.11 4.56 10.99
2 1.78 6.10 2.97 7.16
3 1.30 4.45 2.08 5.01
4 1.00 3.42 1.69 4.07
5 0.74 2.53 1.27 3.06
6 0.50 1.72 1.00 2.41
7 0.42 1.45 0.85 2.05
8 ----- ----- 0.65 1.57
rear 3.42 ----- 2.41 -----