mds22

I have a RK 3.5 I got about 4.25 in the front before adding my bumper.

Rock Krawler Suspension

We have seen plenty of customers wheel their rigs with 3.5" kits and factory driveshafts and have zero issues. most crucial to this is the fact that you make sure to flex your rig out and make sure that you have no limiting factors like bind in the driveline or contact with components. That being said the more and further you stretch the factory driveshaft boots the more susceptible they are to tearing.

RK

mpthompson84

3.5"lift here with stock driveshaft and zero issues. A good installation will go a long way when it comes to the driveshaft angle. I do more trail riding than anything never disconnect my swaybars. If you plan on disconnecting and flexing a lot then you will definitely want to look at replacing different drive shaft, at least the front

jeep_pride

Typically the higher the lift the more money your looking to spend. Driveshaft will just be one of those upgrades you'll need to make and spend money on eventually and maybe sooner than later depending on your trail use.

redridge

I would not let the DS determine what size lift to get. It really is a no issue once the stock DS boot tears... replace the drive shaft and should not need to worry about it again. Tires size should be the limiting factor to the minimum lift size... and money of course. GL

NJKURPat

Its really not a question of x height is safe and y is not. Lifting your jeep puts more stress on the driveline because the CV joint was designed for stock geometry. Plenty of people on the forum are running stock DS with 4" of lift and some need a new DS at 2". Once the vehicle is lifted, its more of a WHEN then an if the DS will fail. Along with the CV tearing, the DS can come into contact with the exhaust crossover bending or damaging the shaft. My 2.5in lift brought me to a little over 3in and i noticed grease after my first flex. That being said, I knew that eventually my DS would fail and I would need a new one. Granted its very little grease so I'm not worried about immediate failure, but now a DS is at the top of my list. Sadly over the 35s.

So dont let the DS determine the lift you want to run, because most likely you will eventually need a new DS, expecially if you disco. Run the lift you want and just save a little extra to run an after market shaft. Most after market shafts members are running are significantly less in diameter then the stock DS, and replace the CV with a double cardon joint.

Ben Todd

3.5 MC lift, exhaust mod and stock DS. I am waiting and ready for failure. That being said I wheel (disconnected and flexed) 2-3 days a week. 8k miles and holding strong 2014 JKUR

Ben Todd

damn thing keeps turning my pics and wont let me edit sorry for the sideways pic

RedneckRhino

I have a 2008 JK 2DR and used a JK DualSport RS Suspension 3.5"/4.5" which for my application does not recommend nor require any additional length or drops for the driveshafts. The only thing is the exhaust which has to be re-routed, but since i was doing a MBRP install this was a non issue.

Here is the link to the page for the 4DR JK DualSport RS Suspension 3.5"/4.5"

American Expedition Vehicles - Brute Kit, V8 HEMI, Aftermarket Jeep Conversions, Products, Wheels, Accessories and Highline Kits for Jeeps (TJ, JK, WK, XK).

They also sell a very similar kit minus the AEV-tuned Bilstein 5160 Remote Reservoir Shocks; you get the 5100 AEV Blistein Shocks. Not pushing AEV though I do very much enjoy the ride quality, manufacturing of parts, and strength of components. It also gave me a better feeling knowing that the Owner is a pioneer to the TJ/JK strech and has been a prototype manufacturer for JEEP for many years now. So experience goes a long way.

This is directly from the page for the above mentioned suspension kit.
2007-2011 Driveshaft: For installation on a 2007-2011 automatic trans JK we recommend a narrower drive shaft.

Hope that helps.

Not to mention these kits for what they come with and there quality are significantly cheaper than most other "name" brands.

TheDirtman

Short arms lifts typically need shorter shafts not longer and this is needed depending on the length of the shocks and the amount of droop you have.