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Old 03-31-2010
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regear ratio questions

im looking at regearing my stock gearing is 4.10's the power loss with the 31's hasnt been to bad but any power loss with a 4 banger is to much using the online guides i figure 4.56 should put me back to stock but im thinking about over gearing it a bit to say 4.88's will this harm anything other than mpg's i know my rpms will be a little higher at highway speeds ill also be getting a tuner and i see there are different kinds of install kits what kind would i need full or minor

this is a few month down the road just getting ready to start saving up for everything
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Old 03-31-2010
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bump
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Old 04-07-2010
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456 is for 33s I've seen people do a 488 with 33s aswell but that will be reving a lot higher. I have a 410 with 31s and the 2.3L and its pretty gutless . I'm going to swap up to the 4.56 and see how it is and then get bigger tires eather 33 or 32s
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Old 04-07-2010
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The autotrans kills your power with bigger tires. I would go 4.56. the 2.3 dura really likes rpm and it would probably do ok with up to a 33in tire.

What size rear end do you have? 7.5 or 8.8
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Old 04-07-2010
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mines a 7.5
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Old 04-07-2010
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ok ima do some math
225-70r15=27.4(stock size)
numbers off of 4.10 gear ratio
27 inch tire=3325rpms
28 inch tire=3206rpms
3325-3206=119 divided by 10=11.9x4=47.6 round up to 48
3325+48=3373

4.10 gear ratio
3373=27.4 inch tire (stock rpms)
2896=31 tire

4.56 gear ratio
3213 rpms on 31's

4.88 gear ratio
3428 rpms on 31's

so should i loose 160 rpms with the 4.56 or should i gain 55 rpms with the 4.88 (as compared to stock)?

numbers based off of this chart and my math i understand 4.11 is not the same as 4.10 but its all i could find
http://www.4wheelonline.com/images/gear-chart.gif

Last edited by silverfox; 04-07-2010 at 11:38 AM.
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Old 04-07-2010
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i may add my next set of tires will be 32's
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