It's the number of turns the driveshaft makes per turn of the axle. So, on
a 3.92:1 rear gear, the driveshaft will turn 3.92 times for every one
revolution of the axle/wheels.
Going to a lower (numerically higher) gear will increase your RPMs at a
given speed but improve your off the line performance. A higher
(numerically lower) gear will get you off the line slower but keep your
RPMs lower at a given speed.
Changing your tires will also affect the "effecitve" gear ratio. A taller
tire will have the effect of going to a higher gear - this is why folks
will go to 3.92s or even 4.10s when moving up to much larger tires than
stock. A lower gear counteracts the taller tires to a degree.
Easy way to remember: High number, high RPMs, high "kick". Low number, low
RPMs, low "kick".
Eric Giblock wrote:
> can someone explain what the ratio of gears means in lamens terms ??!!??
>
> like 3.90 to 1 or whatever.
>
> thanks
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-- -andy andylevy@yahoo.com Maintainer, DML FAQ - http://www.dakota-truck.net/faq/ http://home.twcny.rr.com/andylevy/dakota/ '99 CC 4x4 318 auto
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