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Old 05-11-2013, 10:11 PM
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Default Re-gearing
I want to re-gear my XJ. I have a Chrysler 8.25 rear axle and a Dana 30 or 35 front (I don't know how to tell the difference) I want to re-gear both to 4.88. I have no idea what to buy or where to buy it so any information is helpful. It would be great if someone could tell me how to tell the difference between a D30 and D35. Thanks
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Old 05-11-2013, 10:18 PM
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35 is a rear axle and 30 is a front for starters. Gears are not an easy install and if you don't know what you're doing you'll ruin them and they aren't cheap. Plan on 400+ for parts and 600+ for installation. Several specialty tools used to install them and everything is in thousandths of an inch and you cannot be off. Better off letting someone who knows what they are doing do the work.
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Old 05-11-2013, 10:19 PM
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This link shows several Jeep differentials. It shows the 35, but not the 30.

http://www.jeep4x4center.com/knowled...identifier.htm
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Old 05-12-2013, 08:53 AM
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Originally Posted by xjmarc
35 is a rear axle and 30 is a front for starters. Gears are not an easy install and if you don't know what you're doing you'll ruin them and they aren't cheap. Plan on 400+ for parts and 600+ for installation. Several specialty tools used to install them and everything is in thousandths of an inch and you cannot be off. Better off letting someone who knows what they are doing do the work.
Rangers have a d35 front axle lol seriously though, xjmarc is spot on. Gearing is not something to mess around with. If you don't even know what axle you have, you definitely aren't ready to do a gear job. Pay someone to do it right the first time.
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Old 05-12-2013, 11:39 AM
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I regeared mine to 4:56 last year i got all my stuff from http://www.seriousoffroadproducts.com/
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Old 05-12-2013, 12:56 PM
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Originally Posted by idboy16
I want to re-gear my XJ. I have a Chrysler 8.25 rear axle and a Dana 30 or 35 front (I don't know how to tell the difference) I want to re-gear both to 4.88. I have no idea what to buy or where to buy it so any information is helpful. It would be great if someone could tell me how to tell the difference between a D30 and D35. Thanks
How did you decide on that ratio?
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Old 05-12-2013, 01:29 PM
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Originally Posted by 2KXJJEEP
I regeared mine to 4:56 last year i got all my stuff from http://www.seriousoffroadproducts.com/
Are you satisfied with the new ratio?
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Old 05-12-2013, 01:30 PM
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Originally Posted by Turbo X_J
How did you decide on that ratio?
I looked at a tire size to ratio chart

Here's the link http://www.jeep4x4center.com/jeep-ti...atio-chart.htm
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Old 05-12-2013, 06:20 PM
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Originally Posted by BNJeepsta
Rangers have a d35 front axle lol seriously though, xjmarc is spot on. Gearing is not something to mess around with. If you don't even know what axle you have, you definitely aren't ready to do a gear job. Pay someone to do it right the first time.
Rangers do come with a D35 front TTB axle but it's not a solid axle and didn't want to confuse him. If you want to get technical Jeeps never came with a Dana 35 but a Spicer Model 35, the baby sister to the M20 found in CJs and FSJs.
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Old 05-12-2013, 10:11 PM
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i love the 4.56's i picked them bc there good for 33's and i can go with 35's later and still be good but i tell ya if it wasnt a DD i would have went with 4.88's
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Old 05-12-2013, 10:19 PM
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Originally Posted by 2KXJJEEP
i love the 4.56's i picked them bc there good for 33's and i can go with 35's later and still be good but i tell ya if it wasnt a DD i would have went with 4.88's
Did you notice any difference in low end torque and your mpg's?
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Old 05-12-2013, 10:23 PM
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Originally Posted by 2KXJJEEP
i love the 4.56's i picked them bc there good for 33's and i can go with 35's later and still be good but i tell ya if it wasnt a DD i would have went with 4.88's
Why didn't you want to go 4.88 on a DD?
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Old 05-12-2013, 10:42 PM
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Originally Posted by idboy16
Did you notice any difference in low end torque and your mpg's?
Yea i can tile a difference in the low end torque its great and the MPG isn't bad its bout the same as stock
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Old 05-12-2013, 11:57 PM
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Originally Posted by 2KXJJEEP

Yea i can tile a difference in the low end torque its great and the MPG isn't bad its bout the same as stock
How much was the total cost?
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Old 05-13-2013, 12:41 AM
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bout $800 for the gears and installation kits + shipping and i installed myself and i didnt go with cheap gears either
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