Upgrading gears
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4th Gear
Joined: May 2024
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Upgrading gears
Can someone please help me. I'm so confused after spending hours researching on the internet. I want to buy a 2006/2007 C6 automatic corvette. I plan on doing bracket racing on the weekends. Nothing wild, just basic bolt ons. I've raced camaros, stangs, challengers but never a vette. I see it comes factory with 2.56 gears. I wanted to upgrade the gears to say 3.73. From what I've researched, to upgrade to these gears it says you have to have a minimum of 3.15 gears on your car to begin with. This is where I'm confused. I don't see any info that supports this car with having an option from the factory of having 3.15 gears. Does this mean I couldn't upgrade the gears?
Jay Dee
Jay Dee
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Joined: Feb 2011
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2024 C6 of the Year Finalist - Modified
2020 Corvette of the Year Finalist (track prepared)
2019 C6 of Year Winner (track prepared)
Can someone please help me. I'm so confused after spending hours researching on the internet. I want to buy a 2006/2007 C6 automatic corvette. I plan on doing bracket racing on the weekends. Nothing wild, just basic bolt ons. I've raced camaros, stangs, challengers but never a vette. I see it comes factory with 2.56 gears. I wanted to upgrade the gears to say 3.73. From what I've researched, to upgrade to these gears it says you have to have a minimum of 3.15 gears on your car to begin with. This is where I'm confused. I don't see any info that supports this car with having an option from the factory of having 3.15 gears. Does this mean I couldn't upgrade the gears?
Jay Dee
Jay Dee
With that said however, surprisingly there's not much of a gain with the upgrade from 2.56s to 3.42s in the 1/4 mile, although it is noticeably more responsive on the street. The reason for the minimal difference is that what you gain off the line gets offset by having to make one extra shift. With 2.56s you'll cross the traps at the top end of 3rd, compared to 4th gear with 3.42s. I've switched back and forth a few times over the years and on my high 9 second car the switch was only good for about a tenth drop in my ET.
Also, you can run some pretty stout numbers with just a base model 2.56 differential. This was from late last year (I'm on the left):
