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Best Gears for A6

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Old Jun 28, 2007 | 04:02 PM
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Default Best Gears for A6

I'm looking for the best allround gears for my A6. Not to low but I would be willing to give up some (very little) top end for SOPF on the low end.
I use the paddles most all the time....

Your input welcome
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Old Jun 28, 2007 | 04:54 PM
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Originally Posted by Gman57
I'm looking for the best allround gears for my A6. Not to low but I would be willing to give up some (very little) top end for SOPF on the low end.
I use the paddles most all the time....

Your input welcome
Personally, I'd go with 3.15s but that is to get better gearing for autox to allow me to stay in 2nd in some of the slower sections. The 3.15s will add around 500 rpms at 100 mph in 6th (2700 vs. 2200.) 1st would be good to only 40 mph. Another option you have are 2.73s which the factory is now offering in '08. Both are available as complete assemblies, I believe, through Dyno Tech, a forum sponsor.

--Dan
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Old Jun 28, 2007 | 05:33 PM
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Most go to 3.43
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Old Jun 28, 2007 | 07:02 PM
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Unless you trailer your car to the track for racing use only , the 3.15 gearing IMHO is the best choice . Now that I've had mine for 3 months , I can't imagine driving the C6-A6 without them . I took my car on a 700 mile trip and never regretted or missed the old 2.56 gears . Although , there are a few Mustangs and Ricers around town that wish I didn't have them . [ Disclaimer - I do not condone street racing ] . Call Dynotech for information .
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Old Jun 28, 2007 | 07:41 PM
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I got 3-15s in my 2006 A6 and think they are great. They give you alot more low end power and you will not miss the top end max. I really noticed a big difference at the road track. the car was able to pull much better out of the turns.
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Old Jun 28, 2007 | 08:42 PM
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Originally Posted by C6 Twin Turbo
I got 3-15s in my 2006 A6 and think they are great. They give you alot more low end power and you will not miss the top end max. I really noticed a big difference at the road track. the car was able to pull much better out of the turns.
Can you tell me how much it cost installed?
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Old Jun 28, 2007 | 08:50 PM
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Regardless of which gear set you do go with the real issue to be aware of is that there are many complaints about where the A6 transmission shifts at with the new gear set. The tuning upon install can be tricky since most tuners tell you to go easy on the car until you have XXX miles on it. The trouble starts some time later when you have that amount of miles on the break in and then floor the car only to find it bouces off the rev limiter without shifting properly.

Choose a close tuner so you can return on this common after install issue. It is very fixable and not a big problem. I state it only for the sanity of fellow vette forum members who I want to simply be prepared for what is a common occurance. If you choose a tuner 1000 miles away for this mod, you may find an unwanted road trip in the works after the break in just for a small adjustment.
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Old Jun 28, 2007 | 11:17 PM
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Originally Posted by SpinMonster
Regardless of which gear set you do go with the real issue to be aware of is that there are many complaints about where the A6 transmission shifts at with the new gear set. The tuning upon install can be tricky since most tuners tell you to go easy on the car until you have XXX miles on it. The trouble starts some time later when you have that amount of miles on the break in and then floor the car only to find it bouces off the rev limiter without shifting properly.

Choose a close tuner so you can return on this common after install issue. It is very fixable and not a big problem. I state it only for the sanity of fellow vette forum members who I want to simply be prepared for what is a common occurance. If you choose a tuner 1000 miles away for this mod, you may find an unwanted road trip in the works after the break in just for a small adjustment.
Good advice!!!
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Old Jun 28, 2007 | 11:33 PM
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How much will 3.15's degrade highway fuel mileage?
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Old Jun 29, 2007 | 12:02 AM
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Originally Posted by C-INRED
How much will 3.15's degrade highway fuel mileage?
I'll take a stab at this one. I've been cruising in 6th at 75 mph. I then paddle down to 5th and I lose around 2 mpg (go from 31 to 29). Going from the 2.56 to the 3.15 is a 23% change. Going from 6th to 5th is a 26% change. So I would say your mileage will be around 1 to 2 mpg worse.
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Old Jun 29, 2007 | 03:52 AM
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i was thinking on moving to 3:15 gears, but i have no traction with the stock gears in first gear as it is. wouldn't it just make traction worse?
(fyi- i run zo6 1/4's & 335 tires w/ cai & headers). Im here to win races not sit and go up in smoke.
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Old Jun 29, 2007 | 09:13 AM
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I think it would "help" in the 1/4 mile!{my opinion}
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Old Jun 29, 2007 | 09:40 AM
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Originally Posted by SpinMonster
Regardless of which gear set you do go with the real issue to be aware of is that there are many complaints about where the A6 transmission shifts at with the new gear set. The tuning upon install can be tricky since most tuners tell you to go easy on the car until you have XXX miles on it. The trouble starts some time later when you have that amount of miles on the break in and then floor the car only to find it bouces off the rev limiter without shifting properly.

Choose a close tuner so you can return on this common after install issue. It is very fixable and not a big problem. I state it only for the sanity of fellow vette forum members who I want to simply be prepared for what is a common occurance. If you choose a tuner 1000 miles away for this mod, you may find an unwanted road trip in the works after the break in just for a small adjustment.
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Old Jun 29, 2007 | 10:25 AM
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Originally Posted by 12oh
i was thinking on moving to 3:15 gears, but i have no traction with the stock gears in first gear as it is. wouldn't it just make traction worse?
No, its been done time and time again.
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Old Jul 10, 2007 | 06:33 AM
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i go through the traps in 3rd, would i have to shift to 4th with the 3.15's?
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Old Jul 10, 2007 | 08:46 AM
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The only aftermarket gearing available for the 2006-'07 A6 equipped C6 Corvette is the 3.15 ratio, for which we first pioneered and began producing a year ago.

To answer someone above- most do *not* go to 3.42 with this platform, because the 3.42 gearing is not even available for this specific A6 differential. However, we could also produce them if significant demand dictated it, as we work very closely with multiple ring & pinion manufacturers by providing them with the initial engineering of these unique gear sets to get them to produce what we want, when we want it- as long as there is a suitable blank already on the shelf to cut the new design from.
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Old Jul 10, 2007 | 10:37 PM
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Is there a recommended tuning software that works better with a gear swap on an A6?

I realize that "which tuning software is better" questions can be like stepping into a hornet's nest - but it is a legitimate question
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Old Jul 10, 2007 | 10:45 PM
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We use HPT for that particular purpose/application.
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Old Jul 10, 2007 | 11:08 PM
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Originally Posted by DynoTech Engineering
We use HPT for that particular purpose/application.
Talked to Jenny today and I must say she is a great rep for your company. As a business owner myself I recognize someone that knows serving the customer comes first. Give her ...... you just made a customer out of me and when I do my gear swap you will be the people I do it with.
Thanks
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Old Jul 10, 2007 | 11:27 PM
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I am sooooooooooooo tempted to buy a DTE rear end!!!{Hey,..it's been a while since I did a performance mod!!}
I wonder how much $ install would be??
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