C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Gears

Old Aug 27, 2009 | 09:59 AM
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I would like to know if swapping from 3:45's to 3:73's would result in significant top end loss?

Thanks,
Joe B.
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Old Aug 27, 2009 | 10:07 AM
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http://forums.corvetteforum.com/c4-t...or-3-73-a.html
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Old Aug 27, 2009 | 10:18 AM
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The top end limit of a c4 is not rpm limited but rather determined by horsepower. 3.73 gears will not hurt your top end and will probably help.
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Old Aug 27, 2009 | 10:40 AM
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Originally Posted by 383vett
The top end limit of a c4 is not rpm limited but rather determined by horsepower. 3.73 gears will not hurt your top end and will probably help.
Thanks, now all I have to do is wait to see who wants to get rid of a pumpkin with 3:73's.

Joe B.
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Old Aug 27, 2009 | 05:21 PM
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You might want to reconsider 4.10's for your LT4. I don't think you will see a big difference with the 3.73's.
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Old Aug 27, 2009 | 06:45 PM
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I love my 4:10's and it's only an L-98
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Old Aug 27, 2009 | 06:56 PM
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Don't bother with a gear swap unless you intend on going with 4:10's.
This is the ratio the LT-4 should have come with from the factory. I bought my LT-4 new and waited for 10 years before I finally made the change. I wish I had done it back in96'. Also you will run out of hp long before you run out of rpm at top speed. Gas mileage went down about 3mpg, but the car is much more fun and friendly in traffic to drive.
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Old Aug 27, 2009 | 07:13 PM
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Here's a calculator you can use to determine rpm/mph with different gears.

http://www.f-body.org/gears/
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