installing RK 2.5" stock lift - JKowners.com : Jeep Wrangler JK Forum
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post #1 of 72 Old 07-06-2015, 12:33 PM Thread Starter
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installing RK 2.5" stock lift

well, after a little more than a month, i finally got my RockKrawler 2.5" Stock Mod System

http://www.rockkrawler.com/ProductDe...tCode=JK25SM-4

now, the first thing i did was take measurements of how the jeep sits right now. it already has some 285/70R17 mud terrains, so its a little bit higher than stock...

i noticed i have a small difference between the drivers and passengers side. is this normal?? could it be because its parked on an uneven surface??

i measured from the floor to the bottom of the fender flare....

driver front 32 1/2"



passenger front 32 1/4"




driver rear 28"



passenger rear 28 3/8"



hitch 17"




so, on the front the drivers side is 1/4" higher, but on the rear the pasengers side is 3/8" higher... is this something to be concerned?? this is my first time working with suspension components or installing a lift kit on jeeps with springs...

thank you!

2007 JKU, 2.5" Rock Krawler lift, 285/70 17 mud terrains....

Last edited by shu2kill; 07-06-2015 at 12:39 PM.
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post #2 of 72 Old 07-06-2015, 01:07 PM
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It is likely just fine. Make sure that your coils terminate in the front at the stop on the spring pad and that your coils terminate in the same place on both sides in the rear on the axle pad.

Remember that your gas tank is on the passenger side, so it is common to be a little lower on that side with a full tank of fuel.

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post #3 of 72 Old 07-06-2015, 01:13 PM Thread Starter
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thanx Marcus!!

on another note, on the instructions provided by RK, they dont mention how to set the adjustable track bar to center the front axle... i got these instructions on another post:

Quote:
"Track bar adjustment is pretty simple honestly. I mean ultimately its up to you and you can have it professionally aligned....or you take a tape measure to your driveway after you install the lift and do this:

-Drivers side front: Measure from the lowest fixed hard point on the body/frame...say the upper shock mount to a fixed point on the axle, say the hub face...or the C. Record that measurement.
-Passenger side front: Measure from the same fixed point on the body/frame to the same fixed point on this side of the axle
-Compare results and adjust the track bar accordingly

Or just do what a lot of us do, stick your thumb up, squint through one eye, and adjust side to side until your satisfied lol
so thats how i will do it once i get to that step... im beginning today and only working in the afternoons, so it will take a while...

2007 JKU, 2.5" Rock Krawler lift, 285/70 17 mud terrains....
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post #4 of 72 Old 07-06-2015, 01:20 PM
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I usually put the whole thing together and get it back on the ground and put the track bar in with the help of a friend turning the steering wheel slightly to help me line up the holes at the axle.

I use a carpenter's level up against either tire and measure in to the same spot on the frame on both sides. If you're off 1/2" then adjust the track bar 1/4" in the direction it needs to go (shorter or longer). Always adjust half the distance you're off to center it.

Marcus


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post #5 of 72 Old 07-06-2015, 01:29 PM Thread Starter
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Quote:
Originally Posted by RiverCityOffroad View Post
I usually put the whole thing together and get it back on the ground and put the track bar in with the help of a friend turning the steering wheel slightly to help me line up the holes at the axle.

I use a carpenter's level up against either tire and measure in to the same spot on the frame on both sides. If you're off 1/2" then adjust the track bar 1/4" in the direction it needs to go (shorter or longer). Always adjust half the distance you're off to center it.

Marcus

thanx, i guess ill do it as you mention, seems easy...

more or less whats the approx time it takes to do the installation??

2007 JKU, 2.5" Rock Krawler lift, 285/70 17 mud terrains....
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post #6 of 72 Old 07-06-2015, 01:36 PM
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Don't freak out if you see your passenger side leaning lower that the driver when you have a full tank.

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post #7 of 72 Old 07-06-2015, 01:36 PM
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There are a lot of variables. The 2.5 Stock Mod shouldn't take you too long. If you've never done something like this it'll probably take you 4 - 6 hours working slow. Maybe longer...it just depends on your tool set and skill level.


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post #8 of 72 Old 07-06-2015, 01:50 PM Thread Starter
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Quote:
Originally Posted by RiverCityOffroad View Post
There are a lot of variables. The 2.5 Stock Mod shouldn't take you too long. If you've never done something like this it'll probably take you 4 - 6 hours working slow. Maybe longer...it just depends on your tool set and skill level.
i thought it would take longer, but i read the instructions and it doesnt looks too complicated....

besides the basic hand tools, i have a floor jack, 4 jack stands, and tire blocks... i guess thats all i will need....

2007 JKU, 2.5" Rock Krawler lift, 285/70 17 mud terrains....
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post #9 of 72 Old 07-06-2015, 02:12 PM
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I always like to tell people. The "lift" is front coils/bump stops and rear coils.
Once done everything else is installed at ride height.

2007 JKR | PSC Big bore box | Rock Krawler 3.5" x-factor arms l SteerSmarts YETI track bar, tie rod, no drill flipped drag link, Griffin | Synergy frame brace | 37x12.5x17 Nitto RG's | Dana front DS | Fox IFP shocks | Artec front armor kit/Currie JJ's | Teraflex rear axle bracket | EVO Rockstars | Ridged D's, A pillar mounts | VKS sliders l Trek Armor seat covers | Superchips/Sprint booster | Savvy half doors w/ Bestop uppers
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post #10 of 72 Old 07-06-2015, 05:35 PM Thread Starter
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thanx jkeeper, ill have that in mind....

i just came across what could be a somehow major issue.... i didnt knew which were the front and rear springs, so i did a search... the springs i got are labeled 04186 and 04187.... so i did a search and it appears these are 1.5" springs??? can anyone confirm??

http://www.offroadelements.com/rock-...ngler-jk-2007/

i dont even live in the US, and i waited more than 1 month to get the system and then i had to drive 4 hours one way to pick it up in Texas.... i really hope they didnt send me the wrong springs.....

2007 JKU, 2.5" Rock Krawler lift, 285/70 17 mud terrains....
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post #11 of 72 Old 07-06-2015, 06:12 PM
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If you have a four-door yes.

2007 JKR | PSC Big bore box | Rock Krawler 3.5" x-factor arms l SteerSmarts YETI track bar, tie rod, no drill flipped drag link, Griffin | Synergy frame brace | 37x12.5x17 Nitto RG's | Dana front DS | Fox IFP shocks | Artec front armor kit/Currie JJ's | Teraflex rear axle bracket | EVO Rockstars | Ridged D's, A pillar mounts | VKS sliders l Trek Armor seat covers | Superchips/Sprint booster | Savvy half doors w/ Bestop uppers
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post #12 of 72 Old 07-06-2015, 06:19 PM Thread Starter
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Quote:
Originally Posted by kjeeper10 View Post
If you have a four-door yes.
yes, i have a 4 door...

so i got wrong springs???

2007 JKU, 2.5" Rock Krawler lift, 285/70 17 mud terrains....
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post #13 of 72 Old 07-06-2015, 06:27 PM
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Quote:
Originally Posted by shu2kill View Post
i thought it would take longer, but i read the instructions and it doesnt looks too complicated....

besides the basic hand tools, i have a floor jack, 4 jack stands, and tire blocks... i guess thats all i will need....
I just installed this on my wife's jeep and turned out really nice, you might consider getting the rear trackbar bracket on the axle to bring the rear axle more centered or get an adjustable rear track bar. The rear bracket will need to be welded on
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post #14 of 72 Old 07-06-2015, 06:55 PM Thread Starter
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Quote:
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I just installed this on my wife's jeep and turned out really nice, you might consider getting the rear trackbar bracket on the axle to bring the rear axle more centered or get an adjustable rear track bar. The rear bracket will need to be welded on

do you have a pic?? i got the 1.5" springs and now im debating over wether or not to return them and get 2.5". a side shot of your wifes jeep would be great.

and yes, i do have the rear trackbar bracket and front adjustable trackbar...

thanx!!

2007 JKU, 2.5" Rock Krawler lift, 285/70 17 mud terrains....
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post #15 of 72 Old 07-06-2015, 06:56 PM
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Quote:
Originally Posted by shu2kill View Post
yes, i have a 4 door...

so i got wrong springs???
The springs you have are 1.5" triple rate springs for a 4dr JK.


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post #16 of 72 Old 07-06-2015, 07:02 PM
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Or 2.5 on a 2 door. Yes he got the wrong coils.
OP ..another option. You will get around 2" on a 4 door. How about adding 1/2" or 3/4 spacers all around ?

K

2007 JKR | PSC Big bore box | Rock Krawler 3.5" x-factor arms l SteerSmarts YETI track bar, tie rod, no drill flipped drag link, Griffin | Synergy frame brace | 37x12.5x17 Nitto RG's | Dana front DS | Fox IFP shocks | Artec front armor kit/Currie JJ's | Teraflex rear axle bracket | EVO Rockstars | Ridged D's, A pillar mounts | VKS sliders l Trek Armor seat covers | Superchips/Sprint booster | Savvy half doors w/ Bestop uppers
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post #17 of 72 Old 07-06-2015, 08:31 PM Thread Starter
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Quote:
Originally Posted by kjeeper10 View Post
Or 2.5 on a 2 door. Yes he got the wrong coils.
OP ..another option. You will get around 2" on a 4 door. How about adding 1/2" or 3/4 spacers all around ?

K
that could work, as i already waited more than 1 1/2 month to get this, and its a 4 hour drive one way to pick it up....

so, i guess im installing this one and see how i like it... if i dont, ill look into getting spacers.... i would really prefer the 2.5" coils though, but i cant wait another 2 months...

besides, im not sure what RK will say about getting spacers on their lift kit, im pretty sure they mention against it on the installation instructions...

2007 JKU, 2.5" Rock Krawler lift, 285/70 17 mud terrains....
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post #18 of 72 Old 07-06-2015, 08:36 PM
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I don't think so. Many people use small spacers to compensate for heavy loads.

2007 JKR | PSC Big bore box | Rock Krawler 3.5" x-factor arms l SteerSmarts YETI track bar, tie rod, no drill flipped drag link, Griffin | Synergy frame brace | 37x12.5x17 Nitto RG's | Dana front DS | Fox IFP shocks | Artec front armor kit/Currie JJ's | Teraflex rear axle bracket | EVO Rockstars | Ridged D's, A pillar mounts | VKS sliders l Trek Armor seat covers | Superchips/Sprint booster | Savvy half doors w/ Bestop uppers
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post #19 of 72 Old 07-06-2015, 08:39 PM Thread Starter
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im also in the process of fabricating a front bumper out of 3/16" steel plate, and it will have a M8000 winch on it, so if i get around 2" out of this lift, im pretty sure it will be less with the added weight.... a 3/4 spacer could be the best solution....

while im at it, is it mandatory to put longer bump stops??

2007 JKU, 2.5" Rock Krawler lift, 285/70 17 mud terrains....
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post #20 of 72 Old 07-06-2015, 08:45 PM
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Here's the exact same springs installed on my Sport with 35's.
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post #21 of 72 Old 07-06-2015, 08:49 PM Thread Starter
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Quote:
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Here's the exact same springs installed on my Sport with 35's.

thanx! i will keep my 33s, and i know 1.5" is more than enough to fit the 33s, but i prefer the 2.5, i feel theres a lot of work involved, and also some $$$, for only a 1.5" lift...

your jeep looks really good though, thats more or less what i want for mine... its a DD/weekend warrior, thats why im keeping the 33s....

2007 JKU, 2.5" Rock Krawler lift, 285/70 17 mud terrains....
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post #22 of 72 Old 07-06-2015, 09:01 PM
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Originally Posted by shu2kill View Post
thanx! i will keep my 33s, and i know 1.5" is more than enough to fit the 33s, but i prefer the 2.5, i feel theres a lot of work involved, and also some $$$, for only a 1.5" lift...

your jeep looks really good though, thats more or less what i want for mine... its a DD/weekend warrior, thats why im keeping the 33s....
If you are sticking with 33's, then the 1.5's are perfect in my honest opinion. If you want to go 35's and keep your stock fenders uncut, then you might be better off with 2.5's or you can add a .75" - 1" spacer with the 1.5's and call it a day as well. Tons of options....


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post #23 of 72 Old 07-06-2015, 09:31 PM
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do you have a pic?? i got the 1.5" springs and now im debating over wether or not to return them and get 2.5". a side shot of your wifes jeep would be great.

and yes, i do have the rear trackbar bracket and front adjustable trackbar...

thanx!!
Here is a pic, kinda of a bad photo with the shade but it's all I have on my phone. This is the 2.5 stock mod with stock tires.
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post #24 of 72 Old 07-06-2015, 09:36 PM
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I would not put spacers if you looking for something that will ride good, the main reason why I got the stock mod was so it would ride better than stock with the bilstien shocks. I was very happy with the lift after installing it with the ride and handling. If the funds don't allow for it then that's one thing but if you can build it right so you don't have to go back and do it again after a few years. I have the rk 3.5 x factor plus on my 2011 and don't plan on making any changes for a long time. Just my thoughts

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post #25 of 72 Old 07-06-2015, 11:52 PM Thread Starter
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Here is a pic, kinda of a bad photo with the shade but it's all I have on my phone. This is the 2.5 stock mod with stock tires.
thanx, that looks good.

but, is that a true 2.5" or do you have the same springs (1.5" for a jku) as i do?? thats the look i want on mine, plus the belly clearance...

i think ill just have to return these springs and get the 2.5", as someone said, its better to build it right now that im just starting...

2007 JKU, 2.5" Rock Krawler lift, 285/70 17 mud terrains....
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