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Thread: Gearing

  1. #1
    Jeep Newb jknic's Avatar
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    Mar 2016
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    07 jkur mc 3.5 gc automatic superchips td2 with 35in stt pros going to 37's within a year. I live in Michigan. It's an hour or more drive to the places that I wheel. Silver lake sand dunes, rocks and valleys, drummond island, badlands, and lots of trails. 5.13 or 5.38?
    Thank you

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  3. #2
    Moderator Pthorpe84's Avatar
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    Mar 2016
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    I would lean towards the 5:13ís. The pinion is very small on the 5:38ís for a D44.

    The gearing could also change depending on motor and transmission. If itís a daily driver you may want to go 4:88ís. Will still be enough for 37ís and especially 35ís

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  5. #3
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    Dec 2017
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    Depends on what you are driving.
    On my 14 Rubi X I had 4:10s stock and I ran 37"s and Rock Crawled here in Arizona.
    I was fine with that set up but to do it correctly you are going to spend $10 grand.

    If you have a Sport or a D30 in front anything that starts with a 5 is too big to work well.
    Buck up and buy a D44 or an after market axle.
    I would just go ahead and swap both axles out and be done with it.
    I think the Dana 60's from Mopar for $10 grand is a good way to go for you.
    That way you won't be doing it over and spending the money twice to get what you need.


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