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Thread: What gear ratio should I go to?

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    What gear ratio should I go to?

    OK so first thing first, 2012 jku with 3.21 gears and running 33x12.5 tires and now I have replaced my little popup trailer with an ultra light 23 foot house trailer that weight about 3000 pounds. I'm looking to regear my diffs this winter and am looking for suggestions on what ratio to go with. My goals for the foreseeable future are to be able to tow the trailer to ardbeg or minden with the Jeep running up to 35" tires and then when the Jeep is paid off and not my daily driver, I'm figuring on moving up to 37's but that won't be for quite a while. I should also mention that right now I'm planning on running stock rims and a/t tires for the winter so too low a gear ratio and I'm running highway speed at 5000 rpm. I'm thinking of 4.10 gears rather than 4.55 for exactly that reason.
    Cheers,
    Blair

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    What transmission do you have?
    2010 JK Unlimited Sahara, rubi axles, 35" duratracs, OME lift: Written off, RIP.
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    6 speed standard

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    Gears are very dependent on tire size re-gearing and swapping from 35's to stock is not really practical when re-geared.. The cost for parts will likely be around $1300tax in. Personally I would recommend 4.56's I always like to go one size bigger then the final stock drive ratio to make up for the added weight and rolling resistance of the bigger tire not just to make up for the overall height.
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    Would you consider either a doubler or 4:1 Tcase gears as well as axle gears????
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    What gear ratio should I go to?

    A 23 foot trailer behind a Jeep? JKU or not, can't say I would want to try it. And is that 3000 pounds dry (without any gear/luggage/water in the tanks/etc)?
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    Quote Originally Posted by igotafrigginjeep View Post
    A 23 foot trailer behind a Jeep? JKU or not, can't say I would want to try it. And is that 3000 pounds dry (without any gear/luggage/water in the tanks/etc)?
    the total loaded weight with the holding tanks empty is 3200 lbs, the drive from the dealership home and back up to owen sound for camping on the long weekend was not bad to tow at all, it didn't actually feel much heavier than my 12' popup i was towing up till a few weeks ago.

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    Quote Originally Posted by igotafrigginjeep View Post
    A 23 foot trailer behind a Jeep? JKU or not, can't say I would want to try it. And is that 3000 pounds dry (without any gear/luggage/water in the tanks/etc)?
    the total loaded weight with the holding tanks empty is 3200 lbs, the drive from the dealership home and back up to owen sound for camping on the long weekend was not bad to tow at all, it didn't actually feel much heavier than my 12' popup i was towing up till a few weeks ago.

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    as for a doubler or 4:1 transfer case, i wouldn't be doing any of this until the jeep is no longer a daily driver at which time i would like to do a rubicon transfer case and front and rear lockers, maybe even move up to tons

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    Doubler and/or a 4:1 TC will do nothing for the performance of the jeep on the highway.

    I would listen to RB, he has knowledge that would benefit you.
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    Doubler and/or a 4:1 TC will do nothing for the performance of the jeep on the highway.

    I would listen to RB, he has knowledge that would benefit you.

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    RB and jak are right. Buy the right gears once.

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    I'm with RB. I had stock 3.07 gears on my TJ and I was running 33 x 12.5 tires and 5th gear was almost non-existent. I was going to regear to 4.10 but after speaking to RB he suggested 4.56 and it was the right decision for my situation.
    '02 TJ, 2" body lift, 2" coil spacers, 33"x12.5" Goodyear Duratracs, 15x8 Pro Comp matte black aluminum rims, D30/D35 regeared with 4.56 gears, Bushwacker Flat Fender Flares, Warn Rock Crawler Front Bumper, Poison Spyder Rocker Knockers, hprtech custom rear bumper with swing out tire carrier, 48" Hi-Lift, Hard Top, Soft Top, Safari, Wrap Around Windjammer, Tonneau and trail cover.

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    I was suggesting it as a viable option for buying the right gears for 35" tires, then adding the gears to the t-case when he goes to 37's.

    has anyone stopped to think about running 35" tires, on stock JK axles.... and stock brakes... while pulling a 23 ft billboard of a trailer???

    If your on the fence between 4.10 or 4.56.... I would consider the following.... they is about a 10% difference, and once you hit 6th gear the difference will be even smaller

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    What gear ratio should I go to?

    I wouldn't be towing a 23 foot trailer with a Jeep on 35 or 37s.

    As far as gears just for the Jeep, I'd say 4.56 as well, but then remember strength issues of the axles, and etc.

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    Quote Originally Posted by BLSXJ View Post
    I was suggesting it as a viable option for buying the right gears for 35" tires, then adding the gears to the t-case when he goes to 37's.

    has anyone stopped to think about running 35" tires, on stock JK axles.... and stock brakes... while pulling a 23 ft billboard of a trailer???

    If your on the fence between 4.10 or 4.56.... I would consider the following.... they is about a 10% difference, and once you hit 6th gear the difference will be even smaller
    And there is even more to it then that. However the OP asked "what gear ratio should I go to?" which is what the general responses should be geared to (no pun intended). If he asked "what's involved in re-geraing?" or "should I tow a trailer that weighs 3000lbs?" my response along with others I am sure would be considerably different.

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    I have 4.56 gears in my dd running new 35x12.5r15 mtr kevlar.... And live the drive and feel on and off road

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