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Old 11-30-2009, 09:51 AM   #1
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Gear Ratio upgrade for 2000 TJ Auto

I have a 2000 TJ auto with stock gearing. (3:73's?) Not sure, but want to rre-gear for the 33's and maybe 35's. I would like a gear ratio that will handle both in case I go to 35's and decide they are too big. The 4Wheel Parts guy says I want 4:88's but that seems too big for the 33's. Wouldnt 4:56 gears be the best for either 33's or 35's? Thanks for your help, guys. Mark

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Old 11-30-2009, 10:12 AM   #2
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The 4Wheel Parts guy is clueless, he's not paying attention to what transmission you have. 4.88 would be great for 33" tires with the 4-speed automatic used in 2003 and newer TJs but not your 3-speed automatic used in 2002 and older TJs.

For 33" tires, go with 4.10. For 35" tires, go with 4.56. Your highway rpms would be excessive with 4.56 and 33" tires.

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Old 11-30-2009, 10:26 AM   #3
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Thank you! I just joined this forum this morning and it has already saved me time money and a big headache had I listened to 4Wheel Parts guy. Thanks again. One more question. If 33's = 4:11 and 35's = 4:56 ... Could I run
4:.27 gears with the 3 speed tranny and be safe with both sized tires? Am I worried way too much about running 35's? Am I good to go with 35's and stock D-30/D-35's? Mostly highway, when off road, mostly desert trails. not much rock crawling, if so It would be mild.... I just dont want to go to 4:56 gears and 35's and regret it. Thoughts? Thanks again!
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Old 11-30-2009, 10:30 AM   #4
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If you plan on possibly moving up to 35's and plan on keeping the dana 35 and don't spend too much time on the hwy, get the 4.56's.
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Old 11-30-2009, 12:27 PM   #5
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perfect. 4:56 gears sounds like the ticket. Thanks!
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