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Gear Ratios for Dana 30 and 35 Differentials


 
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Gray Buffalo
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Joined: 22 Oct 2007
Location: Medina, OH

PostPosted: Mon Oct 22, 2007 10:44 pm    Post subject: Gear Ratios for Dana 30 and 35 Differentials Reply with quote

I have a 97 TJ with a 2.5L and I am in the process of installing a 2" lift, 31-10.5-15's, and a variety of other items. In reading many articles it is said that the performance is deminished with the larger tires. As I only have the 4 cyl power source, will increasing (decreasing) the gear ratio help me to retain the power. Most of the articles talk about decreasing to the 4:88 ring and pinion. Any thoughts, comments??????
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Code3TJ
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Joined: 01 Jan 2004
Location: Uzbekistan

PostPosted: Mon Oct 22, 2007 10:49 pm    Post subject: Reply with quote

You can get an idea by using this chart. Do you plan at some point to go with a taller tire? Also, remember your gas mileage will decrease. Wink
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Gray Buffalo
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Joined: 22 Oct 2007
Location: Medina, OH

PostPosted: Mon Oct 22, 2007 11:04 pm    Post subject: Reply with quote

The 31's will proably be my tallest, the vehicle is for on road and average trail driving. The chart was helpful, thanks! My one other question is the changing of the Differential Case Assembly, I find open cases from $50-$70, and then there are the $270 ones. I can tear the engine apart and put it together, but differentials I have never tackled!
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fishjrl
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Joined: 11 Dec 2006
Location: Canton, Ohio

PostPosted: Wed Oct 24, 2007 3:50 pm    Post subject: Reply with quote

medina?

thats not too far from Canton.
lets find some trails and go wheeling
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Gray Buffalo
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Joined: 22 Oct 2007
Location: Medina, OH

PostPosted: Wed Oct 24, 2007 3:55 pm    Post subject: Reply with quote

Sounds Great! I'll send you an email.
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