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Old 07-19-2014, 04:19 PM   #1
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Help needed before I make another mistake

Is there anyone on this forum who is currently running 33" tires with the 3:21 gear ratio, on their 2014 jku?

I am curious what your setup is and why? Would love to see pics of your jku as well!!

I am considering some blacked out wheels and tires for my jku. This is my DD and will be used for hunting here in the Midwest.

I know I have lost power purchasing the 3:21 but it is what it is and I have to deal with it. I plan on driving it for another 3 years and then purchasing a "rubi" like I should have in the first place.

I am currently running the Stock 17" with 32" tires.

Your suggestions and feedback are appreciated...

Ps: I love this forum
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Old 07-19-2014, 04:29 PM   #2
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33s will not automatically make your vehicle suck. 3.21s do fine in the Midwest. Some folks run 35s with 3.21 (but most don't like this set up). Your 2014 with 3.21 and 33s will do better than an 2011 with 3.73s and 32s, so rejoice!

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Old 07-19-2014, 04:37 PM   #3
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Old 07-19-2014, 04:46 PM   #4
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here is mine, 285/70R17 duratrac's on 17X9 rockstars. 3.21 is fine and handles anything I am willing to throw at what is also my DD.
PS: I did do a Teraflex 1.5" leveling kit on it just for the little extra clearance
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Old 07-19-2014, 04:50 PM   #5
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My son in Ohio runs 33s (MTR-K) with 3.21. He says it is "ok" but obviously would be less of a dog with lower gearing. He just got a 2.5 RK lift.

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Old 07-19-2014, 04:54 PM   #6
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Menedari, thanks for the pic! I love your jeep and color! That blue is really growing on me...& did you use spacers for those wheels?
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Old 07-19-2014, 04:57 PM   #7
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I too fought the battle of Rubi lust, however I still think getting a Sport is the way to go. The rubicon has E lockers, front 44, lower crawl and E Disco. I don't care about the E Disco, Disconnectors are easy. The Front 44 isn't that much better than your D30 as outside of the gears it the same thing and for the price increase you can buy a pro rock or Teraflex D44 that is much stronger. Unlike you I want much bigger tires, so even a 4.10 isn't enough. I would end up re-gearing anyway and at that point lockers aren't that expensive and there are much better locker options out there than the stock Rubicon lockers.

I guess what I'm saying is don't devalue your Sport or rush to get rid of it. A little love, money and time and you can have a much more bad ass JKU for less money than a JKUR.

Don't sweat the 33s, I'm about to put 35" Nitto Trail Graps on my 3.21 auto and plan on leaving it like that until early 15'.
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Old 07-19-2014, 04:57 PM   #8
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Thanks Mommymallcrawler, but does he have any pics to share?
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Old 07-19-2014, 05:02 PM   #9
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Originally Posted by pete_hagstrom View Post
Thanks Mommymallcrawler, but does he have any pics to share?
That is HIS Jeep the Dune one lol. Mine is a Granite JK Rubicon. And I live in Phoenix so there would be cactus in the picture instead of trees if it were mine lol!
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Old 07-19-2014, 05:10 PM   #10
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I too fought the battle of Rubi lust, however I still think getting a Sport is the way to go. The rubicon has E lockers, front 44, lower crawl and E Disco. I don't care about the E Disco, Disconnectors are easy. The Front 44 isn't that much better than your D30 as outside of the gears it the same thing and for the price increase you can buy a pro rock or Teraflex D44 that is much stronger. Unlike you I want much bigger tires, so even a 4.10 isn't enough. I would end up re-gearing anyway and at that point lockers aren't that expensive and there are much better locker options out there than the stock Rubicon lockers.

I guess what I'm saying is don't devalue your Sport or rush to get rid of it. A little love, money and time and you can have a much more bad ass JKU for less money than a JKUR.

Don't sweat the 33s, I'm about to put 35" Nitto Trail Graps on my 3.21 auto and plan on leaving it like that until early 15'.
Nittos are a heavy tire and I suspect hugely you will not be a very happy camper with them on a D30 with 3.21.
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Old 07-19-2014, 05:12 PM   #11
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Menedari, thanks for the pic! I love your jeep and color! That blue is really growing on me...& did you use spacers for those wheels?
Thanks
No spacers, the wheels have a 4-1/2" backspace vs the 6-1/4" of the stock wheels so no need for a spacer.
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Old 07-19-2014, 05:20 PM   #12
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285's with wheel spacers and a Terraflex leveling kit running 3.21's with an auto on my 2014. No performance loss switching from stock tires at all and goes anywhere my Rubicon does just does it in more comfort
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Old 07-19-2014, 05:31 PM   #13
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Not going to lie, you guys are making feel better about my purchase! I love the JKU, and have always been a jeep fan just felt like I made the wrong decision when choosing the 3:21.... Thanks guys and love the pics!
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Old 07-19-2014, 06:01 PM   #14
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The 3.21s are only a mistake if you plan on adding larger tires. They are designed to provide max fuel economy and they do a great a job of it. The D30 front diff is more than enough for most Jeep owners unless you are going to push the envelope off road or you just want to drive care free through most situations. The D30 will hold up fine with 35" tires as long as you load it up with torque when the wheels are turned. You can even get away with 37s if you are mindful of its limitations.
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Old 07-19-2014, 06:16 PM   #15
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People like to rag on the 3.21. But with the additional horsepower and torque the new engine provides, it provides more than enough power for most people's needs.
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Old 07-19-2014, 06:45 PM   #16
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Not going to lie, you guys are making feel better about my purchase! I love the JKU, and have always been a jeep fan just felt like I made the wrong decision when choosing the 3:21.... Thanks guys and love the pics!
Well, you MIGHT have made a mistake getting 3.21. There is very little advantage to them. That said (and I have 3.21) they are good, not great, if; you aren't a serious rock crawler, don't live in the mountains or above 6000 feet, and don't go larger than 33s. 3.56 (who has that?) or 3.73 is probably the sweet spot for a true 33X12.5 tire.
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Old 07-19-2014, 07:08 PM   #17
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Here's mine. 295/75/16

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Old 07-19-2014, 09:06 PM   #18
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You might want to consider selling that thing now and getting into a 2014 Rubi while you can still find them. Jeeps have great resale value and you can probably get a Rubi on the cheap at the end of the model year.

If you wait three years, you'll be looking at the 2018 model, a new machine with who knows what engine, options and front suspension. You may like it better than the JK's but you might not.

Just a thought. Or you could just keep it, throw on some 33's and have fun.
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Old 07-19-2014, 11:00 PM   #19
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I really do appreciate the feed back! Did I say I love this forum?
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Old 07-19-2014, 11:29 PM   #20
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I ran 33s and 3:21 in my '12 for 2 years and never felt like it was underpowered. I've got a 2-door.

I've had others say just the opposite.
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Old 07-19-2014, 11:45 PM   #21
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I have the same setup as you have today - 2014 JKU with 3:21 gears and I have been debating the same question. I have entertained the same idea - should I trade it soon and get a Rubi?

What I have learned from all the awesome folks on this forum is that 33"s on 3:21 gears will do well. If they really suck for you and the type of driving you do, then look into upgrading your gears, it might cost less to do that than trade and get a new vehicle. I am planning to throw on 33" Duratrac's soon and already have the Teraflex Leveling kit. I might even put the 305-75-16 Duratrac's which are 34" tires...

There is a Stickie called "So you want big tires?", read that as well, lots of good information.
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Old 07-19-2014, 11:45 PM   #22
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I ran 33s and 3:21 in my '12 for 2 years and never felt like it was underpowered. I've got a 2-door.

I've had others say just the opposite.
Awesome! What is your current setup?
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Old 07-19-2014, 11:51 PM   #23
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Awesome! What is your current setup?
It's all pretty much listed in my sig (i think).
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Old 07-20-2014, 12:08 AM   #24
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It's all pretty much listed in my sig (i think).
Lol that it is... Sorry I am a newbie!
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Old 07-20-2014, 12:12 AM   #25
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Thanks Mommymallcrawler, but does he have any pics to share?
Haha that is my jeep :P

Only thing with 3.21 and bigger tires youll notice more down shifting when going up hills more and a little bit more shifting in stop and go traffic

With 33's and cruise control @ 60mph I was able to stay in the 18-19mpg range still...not sure what it will be with the lift now though
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Old 07-20-2014, 12:14 AM   #26
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Lol that it is... Sorry I am a newbie!
No worries.
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Old 07-20-2014, 12:14 AM   #27
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I have the same setup as you have today - 2014 JKU with 3:21 gears and I have been debating the same question. I have entertained the same idea - should I trade it soon and get a Rubi?

What I have learned from all the awesome folks on this forum is that 33"s on 3:21 gears will do well. If they really suck for you and the type of driving you do, then look into upgrading your gears, it might cost less to do that than trade and get a new vehicle. I am planning to throw on 33" Duratrac's soon and already have the Teraflex Leveling kit. I might even put the 305-75-16 Duratrac's which are 34" tires...

There is a Stickie called "So you want big tires?", read that as well, lots of good information.
Amalesh,

You're rocking a lot of weight on that jeep. You still feel it has some get'up?

I just notice your bumpers....
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Old 07-20-2014, 03:25 PM   #28
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Amalesh,

You're rocking a lot of weight on that jeep. You still feel it has some get'up?

I just notice your bumpers....
Have not seen a big drop in mileage or the power. so far its just the front bumper that's been replaced, the rear is still the factory. The bumper / stinger weight about 100 Lbs total...and I am yet to add a Winch - I will get one with synthetic rope though, to save the weight !
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Old 07-20-2014, 03:35 PM   #29
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Looks good!
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Old 07-20-2014, 03:44 PM   #30
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I have 3.21, with 35s and a 2.5 inch lift. It is fine.

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