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Old 03-17-2010, 06:38 AM   #1
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Lifting from 2" to 4" - any concerns?

so i have a 2006 6-speed TJ with 3.07 gears and - knowing that my acceleration will suck - i ordered 33" GD Wrangler Duratracs for this summer.

right now, i have a 2" OME lift with the usual stuff (spring coils, shocks, TC drop, trackbar relocation) but i obviously need more lift for the tires. i don't want a body lift, so i thought about putting in 2" coil spacers for now. to compensate for the extra height, i'll order the 4" procomp MX6 adjustable shocks (i found the OME too soft anyway).

i was thinking this shouldn't be too much of an issue from a technical side. but now some jeep expert here in switzerland (where i live) told me that going up to 4" will require me to elongate the brake wires and readjust the power train and so and so forth.

so far, i've only had a bit of an issue getting in the reverse gear in my 6-speed manual after lifting to 2".

what do you guys think?
any advice or input is highly appreciated! thanks!

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Old 03-17-2010, 07:01 AM   #2
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Your probably going to see issues with front and rear trackbar positions moving your axle sideways under the jeep.You might need adjustable trackbars to center the axle.I ran an OME lift with 1 1/4 spacers in the rear and 1 3/4 spacers up front for years.I had an adjustable front trackbar that I adjusted after adding the spacers.The rear moved a little but I just dealt with it.The rear trackbar relocation brackets are different heights for a 2.5 vs 4" lift.Also you might run into driveline vibs,as you will be like 4-4.5 inches of lift.Really should have a SYE/cv rear driveshaft.

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Old 03-17-2010, 08:14 AM   #3
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wow, good to know, thanks!

what brand of trackbar did you have? for the front, i just found this:
Teraflex 1743022 - TeraFlex Front Adjustable Trackbar for 84-06 Jeep® Grand Cherokee ZJ, Cherokee XJ, Wrangler TJ & Unlimited TJ 2-4" Lift - Quadratec

and for the rear this seems nice:
JKS Manufacturing OGS153 - JKS Manufacturing Rear Adjustable Trackbar for 97-06 Jeep® Wrangler TJ & Unlimited with 0-6" Lift - Quadratec

i think by replacing the rear trackbar, i don't have to use a relocation bracket anymore, right?

my problem is that i do quite a bit of highway driving, so i'd rather be on the safe side with my suspension geometry...
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Old 03-17-2010, 11:38 AM   #4
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With a 4" lift, you really only need a new front adjustable track bar, if you have the relocation bracket for the rear, you should be fine. I second getting a SYE/CV driveshaft, but try not to order it from quadratec-can be kind of expensive. I try and look around a lot to find a good deal. You shouldn't need brake lines unless you have upgraded to new control arms which would give you more flex off road.
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Old 03-17-2010, 12:50 PM   #5
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is it true that the unlimted can go to 4" without a tc/trans drop?
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Old 03-17-2010, 01:05 PM   #6
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Is it true...yes and no...some have gotten away with it, some not so fortunate.
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Old 03-17-2010, 03:04 PM   #7
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alright, front adjustable trackbar is noted!

will my existing relocation bracket (which came with the 2" OME set) work or should i get a 4" one? or is buying a rear adjustable trackbar the better (if more expensive) thing to do?

also, what is a possible consequence of not doing the SYE thing? the notorious death wobble?
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Old 03-17-2010, 03:34 PM   #8
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The requirement (at least it is STRONGLY!!! recommended) for a SYE once you get to 4" of suspension lift has nothing to do with Death Wobble. The SYE allows a longer driveshaft to be installed which corrects (reduces) the steepened driveshaft angle caused by that tall of a suspension lift. That steepened angle causes severe drivetrain vibrations caused by the u-joints on the driveshaft. The longer driveshaft installed with the SYE kit is also a CV (constant velocity) style which helps manage the amount of angle seen by any of the CV driveshaft's 3 u-joints. The OE driveshaft only uses 2 u-joints. Not to mention the OE driveshaft starts getting too short at a 4" suspension lift height which can cause the driveshaft to pull off the t-case output shaft if the suspension gets totally flexed out on a tough trail.

You will also need adjustable length upper control arms to adjust the rear axle's pinion angle upward to match the requirements of a CV driveshaft.
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Old 03-18-2010, 06:42 AM   #9
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I believe you can get a rear adjustable trackbar to use with an existing relocation bracket,so you wouldnt have to take it off.RE makes them.A couple things ive learned about rear relocation brackets,#1 the brackets are different heights between the 2.5" OME and a RE 3.5" superflex,sooo you wont be perfect with 4+ inches of lift and the OME relocation bracket.#2 the brackets are also different depending on if you use a SYE/cv setup vs a transfer case drop.Ones angled (SYE/CV),the others straight (transfer case drop)..Muy importante things to think about.....
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Old 03-18-2010, 09:57 AM   #10
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wow, thanks for the warnings...!! guess i completely underestimated the scope of this. muy imortante things indeed!

so following jerry's argument (thanks for the explanation!!), i'm pretty much screwed unless i go for an SYE/CV shaft, right? any good places to get these? 4wd.com? i got a car mechanic who helps me with all my wrangler issues, but he's not that experienced with jeep parts...

or how else will i be able to fit my (already shipped) 33's, with fender flare removal/trimming not being a legal option here...?
dammit i'm a stupid kid for not thinking this over...
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Old 03-18-2010, 10:01 AM   #11
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uhm, how about adding a 1,5" BL? i know it ain't great but would that make it easier?
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Old 03-18-2010, 11:38 AM   #12
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You'd be fine with a 1.25" body lift from JKS or a 1" body lift from any manufacture, really. I'm running a 1" body lift from Performance Accessories and it only took about 45 minutes to install it.
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Old 03-18-2010, 05:02 PM   #13
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Quote:
Originally Posted by RobinHood View Post
uhm, how about adding a 1,5" BL? i know it ain't great but would that make it easier?
How about you quit whining Robin,
and just go get blasted & see the Big Four Tour in Zürich on June 18th!

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Old 03-18-2010, 08:17 PM   #14
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Quote:
Originally Posted by BLACKTOOTHGRIN View Post
How about you quit whining Robin,
and just go get blasted & see the Big Four Tour in Zürich on June 18th!

Attachment 17043
hehe, duly noted!
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Old 03-18-2010, 08:24 PM   #15
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Quote:
Originally Posted by cavediverjc View Post
You'd be fine with a 1.25" body lift from JKS or a 1" body lift from any manufacture, really. I'm running a 1" body lift from Performance Accessories and it only took about 45 minutes to install it.
good to hear, i'm really starting to consider this! 1" would be fine i guess... did you get a motor mount or anything like that to compensate for the BL? or is this not necessary with merely 1 inch?

so how about combining 1" BL and 1" coil spring spacers? together with my 2" OME setup i'd be up at 4" of total lift, ideal for 33's -- and maybe without any driveline issues, no?

anybody have experience with such a combination?
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Old 03-18-2010, 09:59 PM   #16
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You know I'm just yank'n your chain.

That's probably going to be a good show though.
Wish they were doing it in the USA.

I AM goin to see Megadeth Testament & Slayer though later this summer.
That'll be KILLER!

I'll get back with you on the PM you sent me when I have a bit more time.

Until then...Cheers!
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Old 03-18-2010, 10:18 PM   #17
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Quote:
Originally Posted by RobinHood View Post
good to hear, i'm really starting to consider this! 1" would be fine i guess... did you get a motor mount or anything like that to compensate for the BL? or is this not necessary with merely 1 inch?

so how about combining 1" BL and 1" coil spring spacers? together with my 2" OME setup i'd be up at 4" of total lift, ideal for 33's -- and maybe without any driveline issues, no?

anybody have experience with such a combination?
I also added a 1" MML made by JKS, but that was only because I didn't like having to use the fanshroud adapters. If you don't have any vibes, don't worry about it.

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