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  1. #1
    JK Newbie
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    Default 5.13 gears with Dana 30

    Is 4.88 the highest gear ratio available for the Dana 30 or will 5.13 gears work. Running 3.73 auto with 35s on d30 front and d44 rear.
    Thanks

  2. #2
    JK Enthusiast erol1991's Avatar
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    Quote Originally Posted by Geep 2010 View Post
    Is 4.88 the highest gear ratio available for the Dana 30 or will 5.13 gears work. Running 3.73 auto with 35s on d30 front and d44 rear.
    Thanks
    5.13 will work on dana 30, check out northridge
    http://www.northridge4x4.ca/proddeta...VERHAUL&cat=36
    If you think it, you can achieve it.


    In the beginning their were no roads. Only Jeeps roamed the land.
    Then man built roads, as well as cars
    Skyscrapers as tall as mountains
    But in the end their will be no roads, no buildings
    and again only Jeeps will roam.

  3. #3
    JK-Forum Founder
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    Quote Originally Posted by Geep 2010 View Post
    Is 4.88 the highest gear ratio available for the Dana 30 or will 5.13 gears work. Running 3.73 auto with 35s on d30 front and d44 rear.
    Thanks
    you can run 5.13 and a lot of folks are doing just that

  4. #4
    JK Super Freak rdubb1031's Avatar
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    Quote Originally Posted by wayoflife View Post
    you can run 5.13 and a lot of folks are doing just that
    Any negatives to running 5.13 w/ the d30?
    2007 Black Sahara
    *Lifted*

  5. #5
    JK Enthusiast erol1991's Avatar
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    Quote Originally Posted by rdubb1031 View Post
    Any negatives to running 5.13 w/ the d30?
    your jk might explode
    If you think it, you can achieve it.


    In the beginning their were no roads. Only Jeeps roamed the land.
    Then man built roads, as well as cars
    Skyscrapers as tall as mountains
    But in the end their will be no roads, no buildings
    and again only Jeeps will roam.

  6. #6
    JK-Forum Founder
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    Quote Originally Posted by rdubb1031 View Post
    Any negatives to running 5.13 w/ the d30?
    a couple. first off, the higher gear ratio will cause your front drive shaft to spin really really fast and if you're running an aftermarket u-joint style shaft, it will vibrate pretty good if you have too much caster and/or don't have it balanced perfectly. over time, this can cause your t-case to crack. i have seen this happen many times one multiple JK's including mine. the other problem is that on a dana 30, the pinion gets to be really small on a 5.13 and this can potentially be a weak point when wheeling hard.

  7. #7
    JK Super Freak rdubb1031's Avatar
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    Quote Originally Posted by wayoflife View Post
    a couple. first off, the higher gear ratio will cause your front drive shaft to spin really really fast and if you're running an aftermarket u-joint style shaft, it will vibrate pretty good if you have too much caster and/or don't have it balanced perfectly. over time, this can cause your t-case to crack. i have seen this happen many times one multiple JK's including mine. the other problem is that on a dana 30, the pinion gets to be really small on a 5.13 and this can potentially be a weak point when wheeling hard.
    All stock from my point of view. Teraflex lift (2.5") and Nitto 35s only. will I be asking for trouble?
    2007 Black Sahara
    *Lifted*

  8. #8
    JK Super Freak sa29560's Avatar
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    Quote Originally Posted by rdubb1031 View Post
    All stock from my point of view. Teraflex lift (2.5") and Nitto 35s only. will I be asking for trouble?
    Doesn't sound too dangerous. 5.13s will help with the power loss and because you already have 3.73s you don't need a new carrier which saves a little bit of cash.

    I have been shopping around in the greater metro area for pricing on gear installs, if I come across something reasonable I will be sure and post it up
    07 X 1/2 Doors 6 Speed Lift 33s 4.10s

  9. #9
    JK Super Freak rdubb1031's Avatar
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    Quote Originally Posted by sa29560 View Post
    Doesn't sound too dangerous. 5.13s will help with the power loss and because you already have 3.73s you don't need a new carrier which saves a little bit of cash.

    I have been shopping around in the greater metro area for pricing on gear installs, if I come across something reasonable I will be sure and post it up
    Thanks let me know.. Actually I'm running stock 4.10s.. apparently the previous owner paid for the upgrade.. so the power loss hasn't been all that bad.. Don't get me wrong, running up to Copper sure is a struggle. any concerns with 4.10s and the setup I listed above and changing to 5.13s?
    2007 Black Sahara
    *Lifted*

  10. #10
    JK Super Freak sa29560's Avatar
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    Quote Originally Posted by rdubb1031 View Post
    Thanks let me know.. Actually I'm running stock 4.10s.. apparently the previous owner paid for the upgrade.. so the power loss hasn't been all that bad.. Don't get me wrong, running up to Copper sure is a struggle. any concerns with 4.10s and the setup I listed above and changing to 5.13s?
    Sorry I misread that, I have 4.10s as well and I am deeply considering 5.13s. I know after I get those 35s I will really be itching to gain some power back. For now my JK does fine though, Copper is the place to ride. I can hope the 5.13s help with gas mileage and uphill cruising during these CO winters as well. It usually takes me a little over half a tank each way to go riding right now.
    07 X 1/2 Doors 6 Speed Lift 33s 4.10s

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