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Old 09-07-2011, 07:57 PM
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largest lift before having to alter anything on '12

new to the whole lift kit thing, was wondering whats the biggest lift i can go with before having to alter the driveshaft or anything else that normally doesnt come with a decent kit. thanks in advance

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Old 09-07-2011, 08:09 PM   #2
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Beyond 3" and you may be looking at front or rear shaft issues down the line. That's the end of my knowledge on it. Wait for others to chime in on it.

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Old 09-07-2011, 08:19 PM
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ok thanks
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Old 09-07-2011, 08:31 PM   #4
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Here's a good reference for the 2007 through 2011: (http://www.jpmagazine.com/techarticl...fts/index.html)

That should give you a good idea of the basics.

For 2012, the two changes I'm aware of are the new auto trans and the new exhaust routing. I thought I saw somewhere that the new auto trans is less of a problem than the old, whereas the new exhaust gets in the way more so than the old.

Hopefully someone will come along and confirm. A few 2012ers already have lifts.
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Old 09-08-2011, 10:33 AM   #5
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Originally Posted by oletennessean View Post
new to the whole lift kit thing, was wondering whats the biggest lift i can go with before having to alter the driveshaft or anything else that normally doesnt come with a decent kit. thanks in advance
Do you have a 2 door or a 4 door? The 2 door can't be lifted as high without replacing both drive shafts. I think 2.5" or 3" is the limit. I have a 4 door and they are more forgiving because of the longer wheelbase. The 2012 doesn't have any issues until about the 4" point. If you have an auto, that won't be an issue like it was with the other JK's. The new auto doesn't get in the way. The problem with the 2012 is the exhaust. Dave from AEV says the driveshaft (even aftermarket driveshafts) will hit the exhaust at full articulation. I'm hoping someone will figure out a way to reroute the exhaust soon.
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Old 09-08-2011, 10:42 AM   #6
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He has a 4 door Sahara in his profile.
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Old 09-08-2011, 11:55 AM   #7
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He has a 4 door Sahara in his profile.
Thanks, I guess I should have checked before I asked how many doors.
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Old 09-08-2011, 01:36 PM
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yeah i've got a 4 door manual, selling the old tj and wanting to spend the money on something useful =-p
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Old 12-03-2011, 11:08 AM   #9
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Hi,
doing same research as you and found teraflex do an exhaust spacer, the link shows how to fit the spacer and not to go more than 3" on the lift to avoid drive shaft issues
2012 JK Exhaust Spacers | TeraFlex Suspensions
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Old 12-03-2011, 01:45 PM   #10
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Originally Posted by oletennessean View Post
new to the whole lift kit thing, was wondering whats the biggest lift i can go with before having to alter the driveshaft or anything else that normally doesnt come with a decent kit. thanks in advance
You can go with a 2.5" lift and avoid the cost of extended brake lines, new ds, etc.

It's not the size of the lift that causes problems with the exhaust / ds. It's more the size of the shocks that come with the lift (or that you add to it.)

Any shocks 27.5" or more will cause your ds and exhaust pipe to hit each other at full articulation. The TeraFlex spacer is one way to avoid this; AFE's y-pipe is another.

Best bet, if you don't want to mess with those, and other, extra expenses, is to buy something like AEV's 2" spacer suspension. You'll have plenty of clearance for larger tires, and your Jeep will still handle like it was stock. Cost is a measly $259. I believe AEV is also coming out with a 2.5" spring lift soon, as well.

If you're looking to go with 35" tires, a 2.5" lift is plenty. Just be aware of the shock length issue mentioned above.

If I'm not mistaken, ESP is running a 2.5" lift with his rig. Maybe he can give you some advice on what he's running, how much it cost, and whether or not he's had any issues with it.
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Old 12-03-2011, 02:05 PM   #11
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I have the Teraflex 2.5" spring lift, running 35" tires, the only thing I had to do was trim the front plastic air dam. No extended brake Lines, driveshaft issues, or exhaust problems.
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Old 12-03-2011, 02:20 PM   #12
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I have the Teraflex 2.5" spring lift, running 35" tires, the only thing I had to do was trim the front plastic air dam. No extended brake Lines, driveshaft issues, or exhaust problems.
Which kit did you go with? I'd like to run 35s on my '12 JKU Auto. I was going to just lift my 4 banger yj but the leaf springs look much more involved and I am more familiar with coil spring suspension. I hear on the new jeeps you can get away with bigger tires with less of a lift (2.5 for example). Did you get shocks with the kit? No rub issues? I want to run 35s but dont want to have to really alter anything - drivetrain / brakelines etc. Post a link if you can. Thanks
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Old 12-03-2011, 02:50 PM   #13
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I got Teraflex #1251000, I didn't do any other alterations except trimming the plastic air dam, the 35"duratracs are fantastic, although I do have a 4.10 gearing
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Old 12-03-2011, 03:47 PM   #14
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I went out on limb and purchased a dealer built 12 JK 4dr, it is equipped with a 4” Mopar lift (which according to the dealer off-road center manager is a super lift kit), 35” baja mtz’s and 373 gears. I was concerned about the gears at first but so far they seem to be ok during the first couple of trips out. I have been able to crawl up and down a steep rock trial where my stock 99 TJ was getting pretty battered underneath with 31” tires and 410’s. The new horsepower and torque helps a bunch but only time will tell how good shafts and axles hold up. Road driving has been great, by no means is it a stock ride but yesterday I had to drive in heavy traffic, while merging onto I244, Myself and a dodge ram 4x4 V8 were both floored and running neck and neck up to 95MPH, I don’t drive like this ever, but it was kinda cool to see how good in handled at least once. The off-road center manager did tell me that if I intended to disconnect the front sway bars that I would need to do some front shaft mods. At this time I didn’t get into all the details of the mods needed but he said it would be about $450.00 total or switch to high pinion axle for a few bucks more……….. maybe I will do it after the new car smell is gone; )
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Old 12-03-2011, 10:24 PM   #15
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I went out on limb and purchased a dealer built 12 JK 4dr, it is equipped with a 4” Mopar lift (which according to the dealer off-road center manager is a super lift kit), 35” baja mtz’s and 373 gears. I was concerned about the gears at first but so far they seem to be ok during the first couple of trips out. I have been able to crawl up and down a steep rock trial where my stock 99 TJ was getting pretty battered underneath with 31” tires and 410’s. The new horsepower and torque helps a bunch but only time will tell how good shafts and axles hold up. Road driving has been great, by no means is it a stock ride but yesterday I had to drive in heavy traffic, while merging onto I244, Myself and a dodge ram 4x4 V8 were both floored and running neck and neck up to 95MPH, I don’t drive like this ever, but it was kinda cool to see how good in handled at least once. The off-road center manager did tell me that if I intended to disconnect the front sway bars that I would need to do some front shaft mods. At this time I didn’t get into all the details of the mods needed but he said it would be about $450.00 total or switch to high pinion axle for a few bucks more……….. maybe I will do it after the new car smell is gone; )

Where are the pictures?
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Old 12-03-2011, 11:55 PM   #16
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Where are the pictures?
here it is, hope this works
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Old 12-04-2011, 12:01 AM   #17
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Not real sure about the wisdom of 95mph, though...
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Old 12-04-2011, 09:14 AM   #18
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I agree kbwwolf, 95 is not wise at all, I’m pretty sure my daily average has been about 35mph, trying to stretch the fuel.
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Old 12-04-2011, 01:35 PM   #19
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sicktwistedfreak, was that $450 for a front DS? If so thats not a bad price. Most aftermarket shafts go for over $500.
As far as going to a high pinion front end, my 2011 JK has one. Are you sure your 2012 doesn"t?
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Old 12-04-2011, 09:14 PM   #20
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Yes I assumed the high pinion thing, but thanks for mentioning, I just crawled out from under it and sure enough D30 high pinion front axle. I will call or email the dealer off road manager and get the details of what he was talking about and let you know. I am a NEWB and were the badge proudly. Spent most of the day at Disney, OK. Made lots of crawls and defiantly lifted the tires of the surface many times, we were slow going and it didn’t feel as if I were over stressing anything, but I can’t help but feel if the sway bar was disconnected that rock trailing would be smother and grip a lot better. I was also wanting to deflate tires a little, but today i had to stay fully aired up until I get a compressor.
So far so good, I am pleased, have ventured onto trials that I would normally bypass, think I even got a scratch or two.
FYI, I am no expert on the Disney Area, but if anybody is into the extreme psycho type rock climbs, there are plenty to be had in this NE Oklahoma area, lots of normal trails, rocks, water and mud for good ol boy and girl jeepin too!! I video recorded a young gal tearing up a big mud hole in a new Land Rover, I couldn’t help but think ether she is way way into wheeling (which is cool) or I would hate to be her daddy wondering why she has been gone so long in my new Land Rover !!
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Old 12-05-2011, 03:53 AM   #21
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I live in Broken Arrow / Tulsa. Where at do you usually go trailing around here? I went on some giant hill with trail by bass pro shop...that was super awesome.
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Old 12-05-2011, 03:56 AM   #22
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I got Teraflex #1251000, I didn't do any other alterations except trimming the plastic air dam, the 35"duratracs are fantastic, although I do have a 4.10 gearing
Have you tried / or think they will be ok at full flex? Want to make sure this kit will quite me fine before I pull the trigger.
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Old 12-05-2011, 05:24 PM   #23
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I live in Broken Arrow / Tulsa. Where at do you usually go trailing around here? I went on some giant hill with trail by bass pro shop...that was super awesome.
Not sure who you were asking, but i too live in BA, from what i have been told the river is bottom here in BA is completely closed off now unless you choose to trespass near the water treatment plant, from what i have been told this is extremely ill advised since 911, but i dont condone trespassing anywhere. It a real shame, for decades there was over miles of great trails, hills, and creeks back there, now it is just land locked refuge i guess. The used to be a couple small areas in Bixby that had some little crawl hills, i used to take my girlfriend there alot, she always thought it was fun!! I am not a big fan of muddin but if you like to mud, there is a small down at the end of 71 st by the lock and damn that you swamp around in, but in my opinion disney is the best all around area takes a little over an hour to get there for me. Below keystone damn is another area if you like the sandy stuff.
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Old 12-06-2011, 12:47 AM   #24
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oh sweet dude. i mapped it. guess it's out on grand lake? is it completely open no haggle? looks like a fun place from what i see from the pictures.
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Old 12-06-2011, 07:46 AM   #25
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oh sweet dude. i mapped it. guess it's out on grand lake? is it completely open no haggle? looks like a fun place from what i see from the pictures.
Yep, its open and its below the dam, stay alert to the release schedules and have fun, i was told by some other jeepers down there last weekend that the t- shirt or gift shop has maps for sale of the area, i was there on Sunday and they were closed.
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Old 12-07-2011, 05:39 PM   #26
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sicktwistedfreak, was that $450 for a front DS? If so thats not a bad price. Most aftermarket shafts go for over $500.
As far as going to a high pinion front end, my 2011 JK has one. Are you sure your 2012 doesn"t?
Got an answer back from the the jeep store dude, it goes like this:
Apparently on the 2012 engine, tranny, and TC the angle is steeper than previous models. Right now if i unhook the sway bars the left front can drop to much and front shaft will rub on exhaust cross over plus it could also bind the cv at the TC. solution offered is first using a mopar over travel limiting strap which the dealer will provide for me free of charge installed. The strap supposedly limits about two inches of the bottom travel on the left side. This sound ok in theory but i really have no clue on whether this is a good idea or not.
The second option is an after market drive that sells for $485 plus shipping and installation, and with this mod would be some sort of trimming to the TC shifter bracket.
Any thought or suggestions would be greatly appreciated, i have had Jeeps and other 4X4's before but all were stock suspension until now.
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Old 12-07-2011, 05:44 PM   #27
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Got an answer back from the the jeep store dude, it goes like this:
Apparently on the 2012 engine, tranny, and TC the angle is steeper than previous models. Right now if i unhook the sway bars the left front can drop to much and front shaft will rub on exhaust cross over plus it could also bind the cv at the TC. solution offered is first using a mopar over travel limiting strap which the dealer will provide for me free of charge installed. The strap supposedly limits about two inches of the bottom travel on the left side. This sound ok in theory but i really have no clue on whether this is a good idea or not.
The second option is an after market drive that sells for $485 plus shipping and installation, and with this mod would be some sort of trimming to the TC shifter bracket.
Any thought or suggestions would be greatly appreciated, i have had Jeeps and other 4X4's before but all were stock suspension until now.
One more thing, the drive shaft comes from a company called je reels it it also requires relocating the fuel tank purge canister???
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Old 12-08-2011, 07:50 AM   #28
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Got an answer back from the the jeep store dude, it goes like this:
Apparently on the 2012 engine, tranny, and TC the angle is steeper than previous models. Right now if i unhook the sway bars the left front can drop to much and front shaft will rub on exhaust cross over plus it could also bind the cv at the TC. solution offered is first using a mopar over travel limiting strap which the dealer will provide for me free of charge installed. The strap supposedly limits about two inches of the bottom travel on the left side. This sound ok in theory but i really have no clue on whether this is a good idea or not.
The second option is an after market drive that sells for $485 plus shipping and installation, and with this mod would be some sort of trimming to the TC shifter bracket.
Any thought or suggestions would be greatly appreciated, i have had Jeeps and other 4X4's before but all were stock suspension until now.
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One more thing, the drive shaft comes from a company called je reels it it also requires relocating the fuel tank purge canister???
I'm not sure what your dealer is doing, but that doesn't sound right. The advice to replace the driveshaft is accurate, but I'm not sure about the rest of it. I installed a Coast aftermarket front driveshaft on my 2012 and relocated the crossover exhaust pipe with an aFe y-pipe. I never had to relocate any fuel tank purge canister or modify any shift bracket. It sounds like your dealer is trying to get more money out of you.

If it were me, I'd buy the JE Reels driveshaft and either get someone else to install it or do it yourself. I've heard good things about that driveshaft, so that shouldn't be an issue. I'd also see if you need to relocate the crossover exhaust. If you do, fix that and then be done with it.

You won't need to get a suspension limiting strap. Why pay for a lift and then limit its capabilities? It doesn't make sense to me unless you have some other limitation that requires a limiting strap to prevent bottoming out of your shocks or something.
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Old 12-08-2011, 09:22 AM   #29
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Have you tried / or think they will be ok at full flex? Want to make sure this kit will quite me fine before I pull the trigger.
I haven't tried the lift yet at full flex, except for a few snowy ditches, I've only had it on about two weeks now. I love the way it rides. While it was on the lift. I did hang the front suspension at full drop and the driveline came close to rubbing, but didn't hit. I don't forsee any problems.
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Old 12-09-2011, 01:05 AM   #30
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Cool man....Really appreciate all your input.

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