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Thread: 4.56 or 4.88 for 37s on JL rubi ?

  1. #1
    Fresh Catch Jmw015's Avatar
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    4.56 or 4.88 for 37s on JL rubi ?

    Ok so Iíve done what everyone else on the planet with a JL has. Iíve thrown a set of 37ís on with a couple inches of lift. It worked out great with minor reshaping of the rear inner fender liners.
    Iíve heard all this talk about the auto transmission being so great that there is no need to regear a rubicon. When I made the decision to jump on the JL bandwagon I also made the decision to get one with a man pedal. I have to say, the six speed is sweet but freaking sucks with 37s and stock gears. Off road is ok, but Iíd like to use 6th gear from time to time on the road!
    Definitely going to do a gear swap soon. My concern is with the 4.88 ratio, would I basically be eliminating 1st gear on road? Would highway speeds produce too high rpm? Is there a big difference between 4.56 and 4.88?
    My Jeep is not much heavier than stock other than the tires. I do have factory steel bumpers. AEV pintlers. Will add a winch soon and better sliders.
    Any input would be greatly appreciated! Here are a few most recent pics IMG_0332.JPGIMG_0321.jpgIMG_0326.jpg

  2. #2
    Resident Smartass OverlanderJK's Avatar
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    Go with 5.13ís.


    Sent from my iPhone using WAYALIFE mobile app
    RECOMMENDED JEEP PARTS & ACCESSORIES

    2012 Dozer JK
    -Dynatrac PR44/Rubicon Rear
    -Nitto 37Ē Trail Grapplers
    -Rock Krawler 2.5Ē Lift
    -ATX Slabs
    -Warn VR8
    -EVO Armor/Bumpers

    2012 Billet Silver JKUR
    -EVO DTD front and rear
    -Dynatrac PR60/PR80
    -EVO High Clearance Long Arm
    -Nitto 40Ē Trail grapplers
    -KMC Machetes
    -JE Reel 1410/1350 Driveshafts
    -Warn CTI 9.5
    -EVO Armor/Bumpers

    1975 DJ5

  3. #3
    Fresh Catch Jmw015's Avatar
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    Quote Originally Posted by OverlanderJK View Post
    Go with 5.13ís.


    Sent from my iPhone using WAYALIFE mobile app
    Iíve heard the 5.13ís arenít as strong as the 4.88ís. There are so many opinions out there itís hard to know who to listen to. Whatís the advantage of 5.13 over 4.88 or 4.56?

  4. #4
    Resident Smartass OverlanderJK's Avatar
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    Quote Originally Posted by Jmw015 View Post
    Iíve heard the 5.13ís arenít as strong as the 4.88ís. There are so many opinions out there itís hard to know who to listen to. Whatís the advantage of 5.13 over 4.88 or 4.56?
    Advantage is power. You need to hear it the same as you do a JK. Iíve been running 5.13ís for 5 years on my JK. Youíll be searching with 4.88ís still on steep grades I still downshift from 6 to 5th.


    Sent from my iPhone using WAYALIFE mobile app
    RECOMMENDED JEEP PARTS & ACCESSORIES

    2012 Dozer JK
    -Dynatrac PR44/Rubicon Rear
    -Nitto 37Ē Trail Grapplers
    -Rock Krawler 2.5Ē Lift
    -ATX Slabs
    -Warn VR8
    -EVO Armor/Bumpers

    2012 Billet Silver JKUR
    -EVO DTD front and rear
    -Dynatrac PR60/PR80
    -EVO High Clearance Long Arm
    -Nitto 40Ē Trail grapplers
    -KMC Machetes
    -JE Reel 1410/1350 Driveshafts
    -Warn CTI 9.5
    -EVO Armor/Bumpers

    1975 DJ5

  5. #5
    Knows a Thing or Two A.J.'s Avatar
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    Second what Overlander just said. If you want to use high gear and get some hp back 5.13 is the ticket.


    Sent from my iPhone using WAYALIFE mobile app

  6. #6
    Meme King WJCO's Avatar
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    Yep. Go with the 8 inch penis. No girl has ever said I wished I had gone a little smaller. Do it once, do it right. Especially if you carry tools and camping gear, etc.
    Jeep parts and accessories purchased through the following link will help support this forum and at no cost to you.
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  7. #7
    Knows a Thing or Two deezus's Avatar
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    5.13

    Sent from my SM-G973U using Tapatalk

  8. #8
    Fresh Catch
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    If you shine a 6" penis (or wheels) and shave your hair, it'll will look bigger.

    Sent from my SM-T800 using Tapatalk

  9. #9
    Fresh Catch Jmw015's Avatar
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    Quote Originally Posted by OverlanderJK View Post
    Advantage is power. You need to hear it the same as you do a JK. Iíve been running 5.13ís for 5 years on my JK. Youíll be searching with 4.88ís still on steep grades I still downshift from 6 to 5th.


    Sent from my iPhone using WAYALIFE mobile app
    Howís the rpms at 65 or 70 mph?

  10. #10
    Resident Smartass OverlanderJK's Avatar
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    Quote Originally Posted by Jmw015 View Post
    Howís the rpms at 65 or 70 mph?
    3000 at 70.


    Sent from my iPhone using WAYALIFE mobile app
    RECOMMENDED JEEP PARTS & ACCESSORIES

    2012 Dozer JK
    -Dynatrac PR44/Rubicon Rear
    -Nitto 37Ē Trail Grapplers
    -Rock Krawler 2.5Ē Lift
    -ATX Slabs
    -Warn VR8
    -EVO Armor/Bumpers

    2012 Billet Silver JKUR
    -EVO DTD front and rear
    -Dynatrac PR60/PR80
    -EVO High Clearance Long Arm
    -Nitto 40Ē Trail grapplers
    -KMC Machetes
    -JE Reel 1410/1350 Driveshafts
    -Warn CTI 9.5
    -EVO Armor/Bumpers

    1975 DJ5

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