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Old 12-17-2010, 03:08 PM   #5 (permalink)
EcoModding Lurker
Join Date: Oct 2008
Location: Wichita, KS
Posts: 23

'98 Civic - '98 Honda Civic EX
90 day: 40.84 mpg (US)

Stacy's Rav - '05 Toyota Rav4 2WD Sport
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Yes, I have looked at the tires too, but you can't realistically get a 10% gearing difference... and if you did, the car sure would feel sluggish in the lower gears... and turning would become hard to do.

If I was able to swap the 5th gear in a 98 civic with a 88-91 CRX gear I would lower cruising RPM's by 9.8% almost 300 RPM at 65mph

.702 ratio to .771

Is it really possible? I really have no idea what is inside the transmission, or if the gears are compatible or not. And the issues you mention with tolerances kinda scare me...

What about the new civic, it looks like the 5th gear of a 2002 EX has a ratio of .757, so a 7.3% improvement- would that gear fit in a 98 civic tyranny? That surely would be an easier gear to find...
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