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Thread: Rear End ratio help
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12-20-2004 #3
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- Join Date
- Oct 2004
- Location
- Delaware, OH
- Posts
- 1,379
Darren, I have the same trans in my Nova with a 3.42 rear gear and 255/45/17 (26" tall). On the highway I run 2100rpm@70mph in 5th and pull down 17-18mpg.
Take a look at the bottom of this page and enter your info. This is in NO WAY an endorsement of Keisler, they just have a good rpm calculator on their site. According to this calculator 3.73s would only increase your 70mph rpm by an additional 300rpm.
http://www.keislerauto.com/gm/transm...evy2_68-74.asp
HTH,
Dan
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