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Unread 06-14-2013, 11:04 PM   #1
Jclilk
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So I bought a used 2012 2dr JK, the price was too good to pass up. 10k miles with full accessorys only $20k anyways the dilemma is it has the 2.21 gears. It's automatic with D30 infront n D44 outback I live in south Florida and I don't plane on wheeling a lot maybe 1s or 2s. What do you guys think of putting 35s on it?

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Unread 06-14-2013, 11:15 PM   #2
LVCapo
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35's and the 3.21s are just not a good combo, regardless of how flat the terrain, and even with the newer engine and tranny.. Whats wrong with some 33's? 33" Duratracs are ~50lb and are a great multi-purpose tire (handle everything reasonably well).
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Unread 06-14-2013, 11:18 PM   #3
Jclilk
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I had 33s on my CJ and hated them they look awfully small :/. I'm planning to go eiyh procomp 7001 wheels with nittos trail or method wheels with the nitto trails
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Unread 06-14-2013, 11:36 PM   #4
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Well just do the 35s if your heart is set on them. Youíll either be content with the 3.21s or not. If you feel you need to re-gear then 4.10s is a great choice or maybe even go with 4.56 if you plan off roading a lot.
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Unread 06-14-2013, 11:41 PM   #5
LVCapo
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Quote:
Originally Posted by 1222
Well just do the 35s if your heart is set on them. You’ll either be content with the 3.21s or not. If you feel you need to re-gear then 4.10s is a great choice or maybe even go with 4.56 if you plan off roading a lot.
Yep, probably the best advice you'll get.
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Unread 06-15-2013, 07:06 AM   #6
Jclilk
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Originally Posted by 1222 View Post
Well just do the 35s if your heart is set on them. You’ll either be content with the 3.21s or not. If you feel you need to re-gear then 4.10s is a great choice or maybe even go with 4.56 if you plan off roading a lot.
Yea that's what I figured is it expensive to do that job? And what brand should I go with? Like I'm searching around now and I see they got 4.88 and 5.14. The 5.14 is too much so 4.88 seems right according to the gear ratio chart right?
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Unread 06-15-2013, 11:31 AM   #7
chrisjsmith4
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Originally Posted by Jclilk View Post

Yea that's what I figured is it expensive to do that job? And what brand should I go with? Like I'm searching around now and I see they got 4.88 and 5.14. The 5.14 is too much so 4.88 seems right according to the gear ratio chart right?
4.88 is way overkill on the 2012. I have 4.10 factory and 35's. I have plenty of power going over mtn passes and cruising lowland flats. Thats all you need. Depending on where you live anywhere from 700 to 1000 per axle.
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Unread 06-15-2013, 11:53 AM   #8
Jclilk
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Originally Posted by chrisjsmith4 View Post

4.88 is way overkill on the 2012. I have 4.10 factory and 35's. I have plenty of power going over mtn passes and cruising lowland flats. Thats all you need. Depending on where you live anywhere from 700 to 1000 per axle.
My dad is trying to get me to do it with Jeep so I can get warranty and all that... -___- where could I find the 4.10 gears for the D30? And what's a good brand?
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Unread 06-15-2013, 12:50 PM   #9
LVCapo
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Originally Posted by Jclilk View Post
My dad is trying to get me to do it with Jeep so I can get warranty and all that... -___- where could I find the 4.10 gears for the D30? And what's a good brand?
Any reputable shop is going to warranty their work, and probably charge you 1/3 what a Jeep dealership would charge. 4.10 are kind of a hard gear to find, as most people skip up to 4.56.....I definitely wouldn't go higher than 4.56 (you'll need a new carrier for the front D30)
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Unread 06-15-2013, 12:57 PM   #10
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Originally Posted by chrisjsmith4 View Post
4.88 is way overkill on the 2012. I have 4.10 factory and 35's. I have plenty of power going over mtn passes and cruising lowland flats...
This is true and I run the same setup with a JKU loaded with heavy accessories.

Jclilk, be sure you are looking at a gear chart for the 2012 and up JKs and not the 2007 Ė 2011 JKs.
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Unread 06-15-2013, 01:04 PM   #11
222Doc
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The cost of a regear is mostly labor and if you are thinking lockers now is the time as you need to buy two carriers as well. you could save by just getting open carriers. but to lock it latter is the same labor again plus the 2k for say ARB.

I have a Rubi that year auto with 4:10. It does great. if you are going to regear though I would say 4:56max< I would get these , unless 37" are in the future. If so then 4:88.<on 35"s is over geared. 5:13 if you were going 37+, but on a d30? the pin would snap against 37+ When my jeep grows up it may get 37"s just cost to much to do it right.

just watch your axles. to much right foot and you may be seeing how the warranty holds up and why a d30 on 35"s is pushing it.
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Unread 06-15-2013, 02:28 PM   #12
Jclilk
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Originally Posted by 1222 View Post

This is true and I run the same setup with a JKU loaded with heavy accessories.

Jclilk, be sure you are looking at a gear chart for the 2012 and up JKs and not the 2007 – 2011 JKs.
Awesome guys, what about the 4.56? Still overkill? Cause I'm trying to keep my mpg range as close to stock and maintain my power close to stock as well that's why I'm asking, cause if I stay with my 3.72 or w.e it was I would def. Loose a lot
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Unread 06-15-2013, 02:32 PM   #13
Jclilk
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Quote:
Originally Posted by 222Doc View Post
The cost of a regear is mostly labor and if you are thinking lockers now is the time as you need to buy two carriers as well. you could save by just getting open carriers. but to lock it latter is the same labor again plus the 2k for say ARB.

I have a Rubi that year auto with 4:10. It does great. if you are going to regear though I would say 4:56max< I would get these , unless 37" are in the future. If so then 4:88.<on 35"s is over geared. 5:13 if you were going 37+, but on a d30? the pin would snap against 37+ When my jeep grows up it may get 37"s just cost to much to do it right.

just watch your axles. to much right foot and you may be seeing how the warranty holds up and why a d30 on 35"s is pushing it.
Hmm I see and yea I'm not a speed demon on my Jeep, for god sakes it a Jeep not a porsche, I barely pass 2.500 rpm when I drive lol so your saying 4.10s would be just right for the 35
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Unread 06-15-2013, 09:26 PM   #14
1222
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Originally Posted by Jclilk View Post
Awesome guys, what about the 4.56? Still overkill? Cause I'm trying to keep my mpg range as close to stock and maintain my power close to stock as well that's why I'm asking, cause if I stay with my 3.72 or w.e it was I would def. Loose a lot
I donít have experience when it comes to running 4.56s and 35s with 2012 and up JKs so I canít really answer your question directly. I can say though that the 4.10s do seem to be the perfect setup as far as Iím concerned. With the pre-2012s 5.13s are a must with an auto and 35s.

Now, if it was possible to have ordered my Jeep with 4.56s from the factory I probably would have gone with that option. I tend to like to gear on the low side but Iím so happy how things worked out with the 4.10s that I have no desire change anything.
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Unread 06-15-2013, 09:29 PM   #15
gunny40
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Originally Posted by 1222 View Post
This is true and I run the same setup with a JKU loaded with heavy accessories.

Jclilk, be sure you are looking at a gear chart for the 2012 and up JKs and not the 2007 Ė 2011 JKs.
Looked at gear chart and there seems to be about 170 RPM difference at 70mph between the 4.56 and 4.88. With the 6speed manual trans. I am having the same deliema between 4.56 and 4.88. My 2012 is a daily driver with 35s and I want stock performance and mpg. I do plan on occassional trail riding and mudding with buddies. I was tod 4.56, but they are a little more expensive than 4.88. I have to be cost conservative.
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