3.42 help
Race Director
Joined: Sep 2007
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From: Peoria/Phoenix AZ
C6 of Year Finalist (performance mods) 2019
Subfloor has verified that the swap from a 2.56 to a 3.42 and the opposite way has resulted in a .1 second difference in the 1/4 mile. Since no other ratios utilize the full power band, they won't produce as much change.
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The caveat to that is it's still a very worthwhile mod even if your car never sees a minute of track time. When I had to run 2.56s in the car those couple of times, even with all the power I'm making the car actually felt sluggish driving around town.
Racer
Joined: Oct 2011
Posts: 332
Likes: 9
From: Iowa Park TX
And if my converter is holding me back a bit then the gear swap might be a little more beneficial for me especially in that I am not making big power numbers.
And then there is the question of going to the 3.42 or holding back a bit with the 3.15.
Thanks again for the feedback guys.
Le Mans Master
Joined: Apr 2011
Posts: 7,820
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From: Montreal
St. Jude Donor '13
The 3.42's make the car feel better all around. Enjoyment while driving is priority number 1.
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Joined: Mar 2005
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From: Southampton NJ
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No, I run 3.42s all the time and love them. The car does shift into second pretty quickly but my Hoosier drag radials keep everything going straight.
Racer
Joined: Oct 2011
Posts: 332
Likes: 9
From: Iowa Park TX
I am running Hoosier drag radials as well and I make less power than you. Sounds like it should still hook up on a prepped track then.
Thanks again.
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Racer
Joined: Oct 2011
Posts: 332
Likes: 9
From: Iowa Park TX
New feedback needed...
I picked up a 3.42 geared rear end a few months ago. I didn't pay much for it, but it was out of an 06 Z51 model that had a standard transmission. So the pinion gear spline is just a 27 tooth spline. So I don't think it will work with my A6 trany.
It might make a good core though for a gear swap that will allow it to bolt in.
Any recommendations on companies that can swap out the gears?
And I wonder if the ring gear is the same but only the pinion gear is different?
I picked up a 3.42 geared rear end a few months ago. I didn't pay much for it, but it was out of an 06 Z51 model that had a standard transmission. So the pinion gear spline is just a 27 tooth spline. So I don't think it will work with my A6 trany.
It might make a good core though for a gear swap that will allow it to bolt in.
Any recommendations on companies that can swap out the gears?
And I wonder if the ring gear is the same but only the pinion gear is different?
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2024 C6 of the Year Finalist - Modified
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2019 C6 of Year Winner (track prepared)
