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Old 02-14-2012, 06:38 PM   #1
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Who's drove a 2012 with 3.21 gears and 315/70r17 duratracs

I got a 2012 with 3.21 gears, i know should off at least got the 3.73. But did not want to wait. I went to order 285/70r17 duratracs today, and those basterds are on back order again. They told told me 6 to 8 weeks maybe to get them if i am lucky. So my question is who's drove 2012 with same gears with the 315/70r17 duractracs which are 34's rather than the 33's i was looking at. I just made my mind up on tires, then this happens. I just drove 2012 wrangler with 3.21 gears the other day but had 35's KM2's on it. U could not pay me to drive a daily driver with those tires loud, all over the road and vibrated. around town power was fine, but and high way speed it did not want to shift into overdrive. it was a dealer ship car so not sure if speedo and tranny shift points where set right. I did not know since duractracs are smaller and lighter would jeep be able to handle them better rathere than the KM2's. The 315/70r17 duratracs are in stock everywhere and weigh in at 60 lbs a tires, I just don't want to wait for new tires, got new rims waiting for them. This is just my daily driver i drive 5 miles a day, never hardly go off road and its flat in Indiana. Had jeep for around 5 months know and just turned 1,100 miles on it. Tire weight makes a big deal on rotating mass. I am just looking for some one else's opinion if u have already pulled the trigger.

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Old 02-14-2012, 06:55 PM   #2
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My arctic had 321's before I put a 5 inch lift and 37's. Went with 513's. And man what a difference. The 321's are not a good gear for any jeep. Never needed 6 th gear with mine

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Old 02-14-2012, 06:58 PM   #3
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There sneaking 3.21s back into the JKs? Crappy.
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Old 02-14-2012, 07:09 PM   #4
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Originally Posted by Dsmooth292 View Post
I got a 2012 with 3.21 gears, i know should off at least got the 3.73. But did not want to wait. I went to order 285/70r17 duratracs today, and those basterds are on back order again. They told told me 6 to 8 weeks maybe to get them if i am lucky. So my question is who's drove 2012 with same gears with the 315/70r17 duractracs which are 34's rather than the 33's i was looking at.
Dude, what's the rush?

I waited 2 months for my DT's.

I'm running the 315/75R16's with 3.73 gears. Less than ideal. Sixth gear pretty much stinks for passing, going up hills, fighting headwinds, etc.

You already cost yourself $1500 by not waiting for your Jeep to be built with the gears you wanted. Don't compound the mistake. Hold out for the 33's.
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Old 02-14-2012, 07:16 PM   #5
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Ours is in the shop right now being changed to 373's, even with stock tires I did not
like the clutch engagement in 1st gear and 6th gear power was not there even
on smaller hills. I did not like the 321's, the dealer made us a good deal on the
373's.
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Old 02-14-2012, 07:17 PM   #6
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Dude, what's the rush?

I waited 2 months for my DT's.

I'm running the 315/75R16's with 3.73 gears. Less than ideal. Sixth gear pretty much stinks for passing, going up hills, fighting headwinds, etc.

You already cost yourself $1500 by not waiting for your Jeep to be built with the gears you wanted. Don't compound the mistake. Hold out for the 33's.

6th gear?? 2012? ? ??? confused...
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Old 02-14-2012, 07:18 PM   #7
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6th gear?? 2012? ? ??? confused...
Manual.
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Old 02-14-2012, 07:24 PM   #8
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Quote:
Originally Posted by Thumper2012
Ours is in the shop right now being changed to 373's, even with stock tires I did not
like the clutch engagement in 1st gear and 6th gear power was not there even
on smaller hills. I did not like the 321's, the dealer made us a good deal on the
373's.
What is a good deal if you don't mind me asking. I'm asking because everything around me has 3.21 gears.
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Old 02-14-2012, 07:35 PM   #9
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I wanted 35's to begin with, and i was going to regear to 4:10's later, then i figured i would cheap out and go 33's. But it sucks that the 34's duratracs cost like $10 more. Not sure what to do.
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Old 02-14-2012, 07:42 PM   #10
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315/70r17's work fine on the 2012 jks with a 3.73 gear.. ( auto ) not sure on the manual.. 33's i spin them out all the time in mine
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Old 02-14-2012, 07:51 PM   #11
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I have a auto, i have read on hear where some peoples 2012 with 4:10's with 35's are running like 2,800 rpms at 70 MPH, know i now why because its running in 4th gear with auto and not 5th which is overdrive. That is the same thing the one i drove was doing not shifting into overdrive all the time. From stop light to stop light it felt just like my stock jeep.
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Old 02-14-2012, 07:52 PM   #12
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Originally Posted by Dsmooth292 View Post
I wanted 35's to begin with, and i was going to regear to 4:10's later, then i figured i would cheap out and go 33's. But it sucks that the 34's duratracs cost like $10 more. Not sure what to do.
lol...not to rag on you, but that's the crux of the matter, right there. You shoulda been patient enough to wait for a Jeep with 3.73's, but you weren't. And now you've got a tire dilemma as a result of that impatience.

Here are the fixes: Buy 33's and wear em out while you save the $$ to regear so you can go with 35's.

Buy 35's and suffer through lackluster performance while you save the $$ to regear.

You really won't have too much problem with 35's and 3.21's in city driving. You'll feel it most on the highway, in the situations I mentioned above. God forbid you gotta drive through the mountains.

I've got 35's and 3.73's, and can tell you, it's still not ideal. I'm gonna regear this spring, just haven't decided yet whether it'll be to 4.56's or 4.88's. Leaning toward the 88's, cuz the 56's are kind've obscure, and hard to find.

How you attack it is up to you.
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Old 02-14-2012, 07:57 PM   #13
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A 2011 with 3.21s is completely different from a 2012 with 3.21s.

I have a 2012 with 3.21s and 33" tires. Is there a difference? Yes. But the tires are also wider with a larger contact patch. Do I care? Not one bit.
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Old 02-14-2012, 08:05 PM   #14
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hi i have a 2012 with 3.21 , 5 speed auto , with track lock, jeep runs
outstanding 20 mpg city with factory 17" wheels, quiet ride and very easy
to live!!
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Old 02-14-2012, 08:13 PM   #15
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firehawk are they stock tires to on those 17's
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Old 02-14-2012, 08:14 PM   #16
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Quote:
Originally Posted by firehawk
hi i have a 2012 with 3.21 , 5 speed auto , with track lock, jeep runs
outstanding 20 mpg city with factory 17" wheels, quiet ride and very easy
to live!!
But with 35's?
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Old 02-14-2012, 08:21 PM   #17
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Originally Posted by firehawk View Post
hi i have a 2012 with 3.21 , 5 speed auto , with track lock, jeep runs
outstanding 20 mpg city with factory 17" wheels, quiet ride and very easy
to live!!
Me To!
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Old 02-14-2012, 08:23 PM   #18
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But with 35's?
Key point.
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Old 02-14-2012, 08:27 PM   #19
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Even with an auto I don't think 35's and 3.21's is a good idea. That cannot be good for the transmission. Just saying. It's a commuter, you don't need this, you just want this. You need to regear and do tires at the same time, that's really the bottom line if you are dead set on 35's or even 34's IMHO.
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Old 02-14-2012, 08:36 PM   #20
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If i can't get the 33's duratracs for a while what would everbodys 2nd choice be in 33s, i like trail grapplers but heavy and i don't want a loud tire. I had hankook dynopros mts last time not bad, for the price. It kind scares me to buy a tire that keeps going on backorder every couple of months, incase i have problems and have to buy another one of them. And can't get one.
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Old 02-14-2012, 08:42 PM   #21
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If i can't get the 33's duratracs for a while what would everbodys 2nd choice be in 33s, i like trail grapplers but heavy and i don't want a loud tire. I had hankook dynopros mts last time not bad, for the price. It kind scares me to buy a tire that keeps going on backorder every couple of months, incase i have problems and have to buy another one of them. And can't get one.
I'd hold out for the DT's. In fact, I did.

My thinking on the whole re-order thing is this...when your tires start to get close to needing replacement, order em. If they come in 2 months before you REALLY need to change em, sweet! If not, you got time to wait.

Patience, grasshopper.
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Old 02-14-2012, 09:00 PM   #22
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What is a good deal if you don't mind me asking. I'm asking because everything around me has 3.21 gears.
We got them down to $1590 total, they started at $1200 for parts and $700 to $900 for labor, I took the parts sheet they gave me and looked at the online places that are having 30% off and priced out the parts and it got it down to just over $700.

They said they could not go that low on parts but they dropped theirs a bit and then they dropped down the labor and fluids.

We are having a remote start and the gears in and they have a couple little things to fix while it's there.

I'm happy with the deal and we are bringing all the parts home.
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Old 02-14-2012, 09:04 PM   #23
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I don't know - I have 3:21 with 33's and it drives me nuts, I can't imagine 35's. To be honest though, I noticed no difference going from the stock 32's to the 33 duratracs so I guess what do I know?
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Old 02-14-2012, 09:25 PM   #24
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If i can't get the 33's duratracs for a while what would everbodys 2nd choice be in 33s, i like trail grapplers but heavy and i don't want a loud tire. I had hankook dynopros mts last time not bad, for the price. It kind scares me to buy a tire that keeps going on backorder every couple of months, incase i have problems and have to buy another one of them. And can't get one.
Wait for the Duratracs. You won't regret it. The tire keeps going on backorder because so many people order them (because they're a good set of tires)
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Old 02-14-2012, 09:50 PM   #25
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Originally Posted by Dsmooth292
I have a auto, i have read on hear where some peoples 2012 with 4:10's with 35's are running like 2,800 rpms at 70 MPH, know i now why because its running in 4th gear with auto and not 5th which is overdrive. That is the same thing the one i drove was doing not shifting into overdrive all the time. From stop light to stop light it felt just like my stock jeep.
I have 516's with 37's with 6 speed trans and at 70 I'm at 2600 rpm.
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Old 02-15-2012, 06:49 PM   #26
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kbwwolf and others are on target with the recommendation...wait for the 33 duratracs...worth it. I have a 2012 with 3.73s and 285/70/17 duratracs. If you go and read any decent 4wheel magazine you will see the consistent, great ratings on the duratracs for both on road and off road. The duratracs ride better than the stock tires (at 32 psi) and I have had absolutely no power issues. They look great in the 33' size and produce no hum at all until you get up around 70mph, and then only if you listen for it. Go read a Quadratech parts catalog from front to back and by the time you are done the 285 duratracs will be back in stock....
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Old 02-15-2012, 08:37 PM   #27
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315/70r17's work fine on the 2012 jks with a 3.73 gear.. ( auto )
X2! That's what I'm runnin' and it's fine. Still plenty of pickup and I'm turning 2,000 rpms @ 65mph vs. the stock 18" Sahara rims/tires that I was turning 2,150 rpms @ 65mph.

Lost about 2 mpg though...
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Old 02-16-2012, 06:51 AM   #28
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kbwwolf and others are on target with the recommendation...wait for the 33 duratracs...worth it. I have a 2012 with 3.73s and 285/70/17 duratracs. If you go and read any decent 4wheel magazine you will see the consistent, great ratings on the duratracs for both on road and off road. The duratracs ride better than the stock tires (at 32 psi) and I have had absolutely no power issues. They look great in the 33' size and produce no hum at all until you get up around 70mph, and then only if you listen for it. Go read a Quadratech parts catalog from front to back and by the time you are done the 285 duratracs will be back in stock....
Sorry for the dumb question, Jedi6, but do you need spacers or a lift or anything or did the 285/70/17 GY DTs just slap on the original wheels and you are good to go?

Thanks in advance.
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Old 02-16-2012, 05:10 PM   #29
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Just ordered a set of 33's duratracs from a different discount tire store up the road. He said i would have them buy tuesday of next week, he said he can just order them from a different store that had them in stock. The discount tire buy my house told me 3 to 4 weeks, never said he could get them from a different store. I can't wait!!!!!!!!!!
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Old 02-16-2012, 07:07 PM   #30
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My duratracs are on the Rugged Ridge wheels, which have great backspacing. Because of that I had no need for spacers (see pics on my profile). I am not sure if you could get by with it on the stock wheels. I didn't think I needed a lift at all, but about 2 days ago I had some minor rubbing while doing a sharp turn in reverse on an incline. I hadn't had any issues at all, so I assume the incline changed an angle on the tire resulting in the rub. I haven't looked yet to see what it is in contact with. For all daily driving it has worked out just fine. At some point I will entertain doing a 2" lift.

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