How High?

[M T]

What's the consensus...  How high can I lift my Jeep TJ without having driveline vibrations and needing to swap in the SYE/longer driveshaft?

[Rubibago]

I would suggest that you get in touch with SilverTJ.

He has the same base type rig as you do, but there have been some "mods" made to it and now it is a very bad-a$$ machine.  He may have some insight to share with you and what works and what doesn't.

[YoungFluff03TJ]

i have 3" suspension with a small T case drop. no vibes

[parabs]

3" seems to be the absolute break point, however some heeps require a SYE at 2.5" of lift.  The consensus is that it depends on your jeep.

Really, SYE and CV are better than the factory setup, but who wants to pay for it??  If you are extremely concerned, go for the OME 2" kit and you should be fine.

[AV.NINE]

The standard on most of the lifts is 4" then they recommend an sye/drive shaft.

I run 4" on 35's and no vibes, my buddy chris has run a 4" for 4 years with no issues.

But then again on the rough country website an SYE is $200. Why wouldn't you just buy one?

[Rubi03 jef]

add a motor mount lift and that will help as well

4 inch lift and motor mount lift and you should be fine   

[Jrama]

Yes, the concensus will be 4"

SYE is expensive the kit is about 200 the shaft another 350 and then rear adj uppers (if need be) are....200 ish
It's hard to justify the cost but even at 3" of lift it's a world of difference in smoothness over the T case drop I had. I originally went with a 3" lift to avoid the whole SYE issue but in the end I got sick of the belly of the jeep grating the land and the shifter being sucked down and went through with it. In the end it was completely worth it just for how much smoother my jeep is now on the road. Besides, now I'm all set up to go to a full 4" kit in the spring.

[parabs]

I asked this very same question on jeep forum as seen here

It seems to me that the best answer is "it depends" which is also a frustrating answer unfortunately.

[Bnine]

What's the consensus...  How high can I lift my Jeep TJ without having driveline vibrations and needing to swap in the SYE/longer driveshaft?

What do you want to do with your jeep?

There are different answers for different applications.

[M T]

First of all I would like to level up the front - it seems to sit about an 1" or so lower.

Secondly, more tire clearance for my existing 31's.  And maybe one day going to 32's.  A little more flex never hurts either...

Thirdly, a better ride is always nice.  Although, it does ride like a cadillac compared to my previous CJ-7's.

Lastly, to make it look cool!

[Spinalguy]

make it look cool?
33's or bigger

[parabs]

First of all I would like to level up the front - it seems to sit about an 1" or so lower.

Secondly, more tire clearance for my existing 31's.  And maybe one day going to 32's.  A little more flex never hurts either...

Thirdly, a better ride is always nice.  Although, it does ride like a cadillac compared to my previous CJ-7's.

Lastly, to make it look cool!

Old man emu 2" HD kit (sometimes called 2.5" depending on the vendor).

With my Mickey Thompson classic II backspacing, and bushwacker flat urethane flares, I am running 33x13.5 toyo muds and I am not experiencing any rubbing...but it needs a small lift.  OME supposedly has a stock like ride.

If you want ~3" springs on the cheap I would look at the Rough Country 2.75" springs that have progressive rates, and mate that to a set of bilstein 5100's, or a set of AEV Nth degree 3" progressive coils with the same bilsteins.

Cheapest of all, a set of 1.25" spacers and a 2" budget boost will get you what you want.

Most expensive, AEV's highline fender kit.  Run 37's on 2-3" of lift.  


-=edit=-

So I made this bitch rub today..and that makes me a liar, At full lock in reverse I made it rub.