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Old 07-22-2014, 07:48 AM   #15
Pro Stock John
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Drives: 2010 SS / 1967 Camaro
Join Date: May 2009
Location: Chicago, IL
Posts: 7,056
I would do 3.91 gears, for the money going from a 3.45 to a 3.70 isn't worth it.

I did 3.91s in my auto a few weeks ago.
Camaro Now: Mods for the Masses Part I | Part II
13.15@106 1.95 | 100% Stock
12.37@112 1.85 | + Kooks Headers/Cats + 20" 555R + CAI + BW TB + UDP + Tune
12.06@113 1.70 | + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune
11.84@115 1.59 | + 3.91s + Race Star 17x7 Fronts
10.90@125 1.47 | + GPI VVT Cam + BW Ported Heads + CD 3800
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Old 07-22-2014, 08:01 AM   #16
OK2DRUL (Atlanta Club)
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Drives: 2010 Black/IOM 2SS LS3
Join Date: Sep 2013
Location: St. Simons Island, GA
Posts: 1,011
Originally Posted by Mdipinto View Post
Just for curiosity, if you wanted to upgrade the rear gear, but you want to keep the same RPM when going in the highway, how hard would it be to open up the transmission and change the gears in there?
I want to put a 3.9 or a 4.1 rear gear, but I want to keep the car with the good MPG it makes... I was thinking how hard and expensive would it be to change the size of the 4th, 5th and 6th gear...
(as of right now I use 1-3 for fun and just acceleration, 4 for driving in the city, 5 for driving on a higher speed limit still in the city, like 35mph, and 6 for highway)
I know jessrayo has swapped some of the gears in his transmission for ZR1 gears for his mile events. It is possible, but I have no idea how costly it would be. I would assume it would be in line with the cost of a transmission rebuild.

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