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Unread 11-26-2013, 09:26 PM   #1
jkmax
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Driveline rumor for 3.5in lift

I'm very interested in the Rock Krawler 3.5in flex system for my 2011 jku but heard if you lift over 3in you need a new driveline. Is this true?? Will I need anything the lift won't come with?? Also please post pics if you are running one!!

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Unread 11-26-2013, 10:10 PM   #2
suicideking
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You will need a new front driveshaft. Will also need bumpstops and new shocks.
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Unread 11-26-2013, 11:27 PM   #3
mrwhipple
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Probably not right away.
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Unread 11-27-2013, 07:13 AM   #4
HappyTrails
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RockKrawler lift kits usually result in more lift than the advertised amount, especially on a 2-door. This is to compensate for extra accessories added. i.e. Heavy front bumper and winch.

On my two-door, my RK 2.5" Max Travel lift gave me 4 1/4" in the front, AFTER I added a steel stubby front bumper and winch. I ended up replacing the front driveshaft after my first trail ride with the new lift installed. I replaced the rear driveshaft while I was doing the front driveshaft, just to save time in the future.

On a JKU, the rear driveshaft angle is not as severe as on a 2-door. But, I'd recommend you save money for the front driveshaft, as this will likely need to be replaced first.
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Unread 11-27-2013, 07:34 AM   #5
ROCKR8R
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Yup again, Happy Trails nailed it. It is no rumor, it is fact. May last 100 miles may last 10K miles just depends on what you do with your Jeep. If you wheel it every weekend then you will quickly know you need a new driveshaft. Front on a 4 door both on a 2 door.

I had a 2.5" Teraflex on my 2 door, less control arms. Added a .75" spacer for more height and needed to replace my driveshafts and added adjustable control arms. For driveshafts I suggest Adam's. http://stomperoffroad.com/products/driveline.html You can get front and rear for under $700

-Dan
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Unread 11-27-2013, 08:50 AM   #6
jkmax
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Thanks everyone. I'm still debating between the 3.5 and the 2.5. If I got the 2.5 would I still need new drive shafts?
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Unread 11-27-2013, 09:07 AM   #7
ROCKR8R
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Nah, but like Happy Trails said he got 4.5" up front out of his RK 2.5" Max Flex. If you have a 2 door most give more than advertised lift height.

You could get the Teraflex 1.5" Performance Leveling kit and add some .75" lift spacers and be near a true 2.5" lift. Buy some shocks and sway bar disconnects and call it a day

http://www.quadratec.com/products/16190_1102_07.htm
http://www.quadratec.com/products/pr...p+Shocks&c=126
http://www.quadratec.com/products/16315_6600_07.htm
http://www.quadratec.com/products/16160_10X_PG.htm

-Dan
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Unread 11-27-2013, 09:10 AM   #8
jkmax
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Quote:
Originally Posted by ROCKR8R
Nah, but like Happy Trails said he got 4.5" up front out of his RK 2.5" Max Flex. If you have a 2 door most give more than advertised lift height. You could get the Teraflex 1.5" Performance Leveling kit and add some .75" lift spacers and be near a true 2.5" lift. Buy some shocks and sway bar disconnects and call it a day http://www.quadratec.com/products/16190_1102_07.htm http://www.quadratec.com/products/pr...p+Shocks&c=126 http://www.quadratec.com/products/16315_6600_07.htm http://www.quadratec.com/products/16160_10X_PG.htm -Dan
I already am running a 2.5 terra flex budget boost but I am trying to upgrade. I already have fox smooth body shocks too that are long enough for a 2-4in lift
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Unread 11-27-2013, 09:19 AM   #9
ROCKR8R
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Quote:
Originally Posted by jkmax View Post
I already am running a 2.5 terra flex budget boost but I am trying to upgrade. I already have fox smooth body shocks too that are long enough for a 2-4in lift
Well there you go, you are ahead of the game with shocks. Do you have disconnects? The performance leveling kit is a spring kit the 3/4" spacers will add about an inch more in height. The budget boost likely gave you exactly 2.5". Some springs lifts will give you more. I didn't test the limitations on my rig with the 2.5" to see where, if at all, my driveshaft would hit. I wheeled only a couple times and then fairly quickly went to 3.5" and 35's. At that point I needed adjustable control arms and driveshafts (waited a little on the drivelines but it did hit and I tore my boot)

-Dan
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Unread 11-27-2013, 09:53 AM   #10
ferninaz
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No matter what lift you get, putting in an aftermarket driveshaft is just good insurance. That freaking boot Fiat, I mean Chrysler puts on the driveshaft is stupid and tears super easy.
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