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Unread 10-08-2014, 06:27 AM   #1
armyman86
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need some advice

so i have a 2012 jeep wrangler unlimited i wanna lift it 4 in and put 35's on it it seems like it has strong gearing and the axles seem good cause it does have good get up and go but i wanna know if i would have to switch out my rear axel for a bigger one if i do that lift kit and tires

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Unread 10-08-2014, 09:02 AM   #2
bogleparsons
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simple answer is no, your rear axle is strong enough for the tire size.

However you need to really read up on whats involved with a 4" lift, doing it correctly is expensive and much more in depth than you currently come across.

Also you may want to regear, again this can be complicated to a non gear head.

More searches and research is what needs done.
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Unread 10-08-2014, 09:48 AM   #3
KrawlOff-Road
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I agree! I would stay away from the 4" lift idea. That is a ton of lift on a JK. We usually recommend at most a 2.5" for 35's. There is a lot that comes with doing a 4" lift.

Also, we would like to know what gears you have in there. You MIGHT have to regear.

Let us know if we can help!

-Jason
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Unread 10-08-2014, 10:00 AM   #4
Rancho_Lifts
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3" on 35's for a visual.

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Unread 10-08-2014, 10:11 AM   #5
CJ7nvrstk
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x2 on the 2.5" lift and 35s.
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Unread 10-08-2014, 02:53 PM   #6
RockyClymer
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All good advice IMO - never lift more than you need for the tire/wheel combination.
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Unread 10-09-2014, 09:09 AM   #7
armyman86
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Thank you where do I find the gearing at
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Unread 10-09-2014, 09:20 AM   #8
armyman86
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I got 3.73 gears
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Unread 10-09-2014, 12:53 PM   #9
HappyTrails
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Like everyone else has stated, keep the lift minimal. 2.5-3" is enough lift for 35's. Lifting in the 4"+ range becomes very expensive due to driveshafts, steering, and lots of other associated parts necessary to make it run properly.

I hear the 3.73 gears are "acceptable" for the 2012+ JK.

Unless you really need the performance or plan to do towing, I'd save the money for something else rather than a gear change. Only you can tell if it needs a gear change after installing the 35's.

If you feel it does need a gear change, plan to spend about $1500-2000 for a gear swap (both axles and done by a professional).
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Unread 10-09-2014, 02:21 PM   #10
armyman86
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Thank you who ate some good places for good jeep lifts I was thinking rough country and do the make fox shocks to fit
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Unread 10-09-2014, 02:59 PM   #11
CJ7nvrstk
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If you are looking for a spring lift, RC isn't the best choice. Though they are cheap, they are cheap for a reason. Their BB is fine though IMO.

There are plenty of good lifts out there. I'm happy with my OME springs.

Off topic, armyman86, I reported to Ft Knox KY for OSUT in 86. Where are u? MOS?
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Unread 10-09-2014, 05:52 PM   #12
ttn27
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So what is the gear ratio on a stock JK Wrangler 2012+?

I put 2.5" Rubicon Express coil spring lift kit with mono tube shocks with 315/70R17 tires on my 2013 JK. I was recommended by 4wheelparts to regear but decided not to regear (due to high cost) but only did remap with a superchip Flashpaq only and get about 15-16mph with the superchip and of course still lost some power even with the superchip on these tires and 2.5" lift.

Would you regear in my case above and if you do regear would you get the stock performance and fuel efficiency back?

Would you do a cold air intake instead if you want to regain back some of the loss in performance of the bigger tires and how much performance would you regain with the air intake alone?
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Unread 10-09-2014, 06:03 PM   #13
HappyTrails
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On the JK, a Cold Air Intake is snake oil...worthless, don't waste your money!

Regear ($1,500-2,000 for both axles), supercharge it (~$5,000), or put in a V-8 ($20,000), if you want performance after putting larger tires on it. I'd recommend a regear above all.
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Unread 10-09-2014, 06:58 PM   #14
armyman86
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Cj7 I'm out now was an 11b did 8.5 years
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Unread 10-09-2014, 07:35 PM   #15
CJ7nvrstk
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Quote:
Originally Posted by armyman86 View Post
Cj7 I'm out now was an 11b did 8.5 years
Sweet, thanks for your service brother.

I tapped out at 22.

19D, 68WM6
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