06 rear end
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Joined: Feb 2001
Posts: 27,254
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From: Short Hills, NJ
Originally Posted by ENM
Isnt that kind of high, the z52 being desigined to be a little more aggressive. What is the reasoning for such a high speed rear end ?
As for the reasoning, one, there is no difference in gearing between the non Z51 and Z51 automatics for 2006, that was in 2005 only (2.73 rear versus 3.15 rear (which was also available as a freestanding option as well in 2005)). Second, the gearing inside of the A6 transmission is FAR more aggressive than what was inside the A4 making it's overall straight line performance as good (or better?) than the A4/3.15 combo, it's quite competitive with the manual's ratios actually. Thirdly, fuel economy/CAFE ratings are very important in preventing a gas guzzler tax in the Corvette line as well as throughout GM.
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Joined: Dec 2005
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From: Utah
Originally Posted by LS1LT1
Z51 not Z52, I assume that was a typo error?
As for the reasoning, one, there is no difference in gearing between the non Z51 and Z51 automatics for 2006, that was in 2005 only (2.73 rear versus 3.15 rear (which was also available as a freestanding option as well in 2005)). Second, the gearing inside of the A6 transmission is FAR more aggressive than what was inside the A4 making it's overall straight line performance as good (or better?) than the A4/3.15 combo, it's quite competitive with the manual's ratios actually. Thirdly, fuel economy/CAFE ratings are very important in preventing a gas guzzler tax in the Corvette line as well as throughout GM.
As for the reasoning, one, there is no difference in gearing between the non Z51 and Z51 automatics for 2006, that was in 2005 only (2.73 rear versus 3.15 rear (which was also available as a freestanding option as well in 2005)). Second, the gearing inside of the A6 transmission is FAR more aggressive than what was inside the A4 making it's overall straight line performance as good (or better?) than the A4/3.15 combo, it's quite competitive with the manual's ratios actually. Thirdly, fuel economy/CAFE ratings are very important in preventing a gas guzzler tax in the Corvette line as well as throughout GM.
SO does the A6 have more on the bottom end, the top end or a little of both compared to the A4 ?
Team Owner
Joined: Feb 2001
Posts: 27,254
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From: Short Hills, NJ
Originally Posted by ENM
Oops, it was a typo.
SO does the A6 have more on the bottom end, the top end or a little of both compared to the A4 ?
SO does the A6 have more on the bottom end, the top end or a little of both compared to the A4 ?
This is all just theory of course.
Team Owner
Joined: Feb 2001
Posts: 27,254
Likes: 136
From: Short Hills, NJ
Originally Posted by toorich
why did gm do this?
Originally Posted by LS1LT1
As for the reasoning, the gearing inside of the A6 transmission is FAR more aggressive than what was inside the A4 making it's overall straight line performance as good (or better?) than the A4/3.15 combo, it's quite competitive with the manual's ratios actually....and fuel economy/CAFE ratings are very important in preventing a gas guzzler tax in the Corvette line as well as throughout GM.
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