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Jeep Wrangler JK Resources
JK How-to Guides
Tire Size Gear Ratio Charts
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<blockquote data-quote="Vman" data-source="post: 440544" data-attributes="member: 22091"><p>Looks like the chart is pretty accurate. I plugged in the tire size, transfer case, etc into your link and it differs by 1 rpm from the chart above.</p><p></p><p>I just had my '07 JKU re-geared from 4.10's to 5.13's (42RLE transmission) on 35's and it is soooo much better. Have a pretty steep 7 mile long grade between work and home and with OD off she'd huff and puff switchin gears and shootin up RPMs to try and get up that sucker....going 55.... It was the worst.</p><p></p><p>So I bit the bullet and went with Motive 5.13's and Eaton Truetracs front and rear (I don't do a lot of hard technical rock crawling to need a full time locker) and maaaaaan. Night and day difference. Transmission is shifting great, she's pulling the grade at 65mph no problem, and I'm sitting around 2200-2300 rpm at 65-70ish on the flats.</p><p></p><p>My freaking gas mileage even got better.</p><p></p><p>Only thing I've enjoyed as much as this is the PSC big bore kit I put in. Probably my two best mods so far.</p></blockquote><p></p>
[QUOTE="Vman, post: 440544, member: 22091"] Looks like the chart is pretty accurate. I plugged in the tire size, transfer case, etc into your link and it differs by 1 rpm from the chart above. I just had my '07 JKU re-geared from 4.10's to 5.13's (42RLE transmission) on 35's and it is soooo much better. Have a pretty steep 7 mile long grade between work and home and with OD off she'd huff and puff switchin gears and shootin up RPMs to try and get up that sucker....going 55.... It was the worst. So I bit the bullet and went with Motive 5.13's and Eaton Truetracs front and rear (I don't do a lot of hard technical rock crawling to need a full time locker) and maaaaaan. Night and day difference. Transmission is shifting great, she's pulling the grade at 65mph no problem, and I'm sitting around 2200-2300 rpm at 65-70ish on the flats. My freaking gas mileage even got better. Only thing I've enjoyed as much as this is the PSC big bore kit I put in. Probably my two best mods so far. [/QUOTE]
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Jeep Wrangler JK Resources
JK How-to Guides
Tire Size Gear Ratio Charts
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