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Old 05-17-2013, 09:53 AM   #151
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So how many have issues with RK kifts on JKU's? I'm just curious since most of the threads i see when an RK lift doesnt work for someone it always seems to be in regards to a 2dr jeep which its been stated many times that it gain alot more lift than intended since there lifts seem to be designed for 4dr jk's.

By chance anyone know how much lift the RK 2.5 lift will give on a stock jku? I know the 'listed' lift size is suppose to ve based on a fully loaded jeep(bumpers, winch, tire carrier etc)

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Old 05-17-2013, 10:00 AM   #152
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RK 2.5 max travel here on a JKU. Rides better than any other lifted jeep I've ridden in. I would recommend to any and all.

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Old 05-17-2013, 10:08 AM   #153
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Originally Posted by Jeep757 View Post
So how many have issues with RK kifts on JKU's? I'm just curious since most of the threads i see when an RK lift doesnt work for someone it always seems to be in regards to a 2dr jeep which its been stated many times that it gain alot more lift than intended since there lifts seem to be designed for 4dr jk's.

By chance anyone know how much lift the RK 2.5 lift will give on a stock jku? I know the 'listed' lift size is suppose to ve based on a fully loaded jeep(bumpers, winch, tire carrier etc)
According to RK when discussing a 2.5" lift:
"***** 4 doors will generally achieve 3" of front lift and 2" of rear lift. 2 doors will generally achieve 3.5" of front lift and 2.5" of rear lift. These dimensions are based on fully upfitted JK's! "

Again, these estimates are based on a fully loaded Jeep. If your Jeep is stock I would add an additional 1" to those estimates. All the 4-doors I have installed RK kits on have gotten over 4" on a 2.5" kit. Some more than others and 1 had an aftermarket bumper and winch.
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Old 05-17-2013, 10:41 AM   #154
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Originally Posted by Jeep757 View Post
So how many have issues with RK kifts on JKU's? I'm just curious since most of the threads i see when an RK lift doesnt work for someone it always seems to be in regards to a 2dr jeep which its been stated many times that it gain alot more lift than intended since there lifts seem to be designed for 4dr jk's.

By chance anyone know how much lift the RK 2.5 lift will give on a stock jku? I know the 'listed' lift size is suppose to ve based on a fully loaded jeep(bumpers, winch, tire carrier etc)
I netted a hair under 4 inches with my RK 2.5 lift, and I do have an aftermarket bumper and winch up front, and some additional weight in the rear with the Teraflex hinged carrier and a big ol 35 hanging off.

The issues specific to RK are rare. An issue with a RK lift will get a lot of air time here on the forums as they do happen to be a preferred lift by many Jeep owners, and you dont expect to see it so folks perk up when they see a thread like this. What I do know, however, is that an issue with a lift can occur regardless of vendor or Brand, 99 times out of 100 the issue will be due to an installation mistake.

I personally dont think its worth getting too "academic" about the whole thing. Its really not that complicated....The springs get you some height, and quality components like trackbars and control arms set good lifts apart from great lifts. Do your homework, and take your time with the install and make sure it's done right. If you are paying someone else to do it, double check EVERY component they touched, and re-torque everything to spec before anything else.
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Old 05-17-2013, 10:58 AM   #155
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I was up around 4" or more when first installed. Settled nicely around 3.5"
Height is the only issue I see complaints about. RK does make a point. The height is with a fully modded jeep. A 2 door/light jeep will get more lift with only one coil available both 2 and 4 door.
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Old 05-17-2013, 11:00 AM   #156
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Originally Posted by kurtz265 View Post

I netted a hair under 4 inches with my RK 2.5 lift, and I do have an aftermarket bumper and winch up front, and some additional weight in the rear with the Teraflex hinged carrier and a big ol 35 hanging off.

The issues specific to RK are rare. An issue with a RK lift will get a lot of air time here on the forums as they do happen to be a preferred lift by many Jeep owners, and you dont expect to see it so folks perk up when they see a thread like this. What I do know, however, is that an issue with a lift can occur regardless of vendor or Brand, 99 times out of 100 the issue will be due to an installation mistake.

I personally dont think its worth getting too "academic" about the whole thing. Its really not that complicated....The springs get you some height, and quality components like trackbars and control arms set good lifts apart from great lifts. Do your homework, and take your time with the install and make sure it's done right. If you are paying someone else to do it, double check EVERY component they touched, and re-torque everything to spec before anything else.
Good post Kurtz
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Old 05-17-2013, 11:04 AM   #157
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Good post Kurtz
loving the new avatar
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Old 05-17-2013, 11:26 AM   #158
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Hot new ride
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Old 05-17-2013, 11:26 AM   #159
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Originally Posted by kurtz265 View Post

I netted a hair under 4 inches with my RK 2.5 lift, and I do have an aftermarket bumper and winch up front, and some additional weight in the rear with the Teraflex hinged carrier and a big ol 35 hanging off.

The issues specific to RK are rare. An issue with a RK lift will get a lot of air time here on the forums as they do happen to be a preferred lift by many Jeep owners, and you dont expect to see it so folks perk up when they see a thread like this. What I do know, however, is that an issue with a lift can occur regardless of vendor or Brand, 99 times out of 100 the issue will be due to an installation mistake.

I personally dont think its worth getting too "academic" about the whole thing. Its really not that complicated....The springs get you some height, and quality components like trackbars and control arms set good lifts apart from great lifts. Do your homework, and take your time with the install and make sure it's done right. If you are paying someone else to do it, double check EVERY component they touched, and re-torque everything to spec before anything else.
Excellent post.
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Old 05-17-2013, 11:38 AM   #160
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Hot new ride
You should get in touch w/ this guy:
Want to put 35" On Mini-Van. Need Help With Custom Lift ??
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Old 05-18-2013, 05:29 PM   #161
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It's amazing what a little caster will do. When I first installed the coils I was over 4" of height. Running 4-5* of caster was dangerous for my Adams DS.
3* is horrible. 4* is where I was at until today. PlanMan advised me to try 4.5* to help with my wobbles/handling issues.
Today I rotated my LCA flex joints out one turn. Big difference in drivability as expected.

With the stock DS, you can safely run 5*
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Old 05-18-2013, 05:49 PM   #162
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Quote:
Originally Posted by kjeeper10 View Post
It's amazing what a little caster will do. When I first installed the coils I was over 4" of height. Running 4-5* of caster was dangerous for my Adams DS.
3* is horrible. 4* is where I was at until today. PlanMan advised me to try 4.5* to help with my wobbles/handling issues.
Today I rotated my LCA flex joints out one turn. Big difference in drivability as expected.

With the stock DS, you can safely run 5*

Your hot new ride has a solid front axle?
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Old 05-18-2013, 05:55 PM   #163
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Your hot new ride has a solid front axle?
Shhhhh
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Old 05-18-2013, 06:06 PM   #164
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kjeeper10: I had both driveshafts made by Bill's Englewood Driveshafts (local shop) and he specializes in racing drive shafts but apparently is very good with Jeep ones and truck ones too. I went with a 1310/1350 combo. What caster is best for aftermarket ones? You say 4-5* is dangerous for your Adam's DS but you are going to run 4.5? Maybe I misread that, but am slightly confused. Has this change resolved a lot of your handling issues?

RK agreed to take their RRD shocks back, so I will be replacing them with 5160s and I will just go ahead and replace the springs with Synergy springs. I'll keep the control arms and hopefully they will work out okay with the new springs. Will keep you all posted though may be a few weeks before the shocks come in. I don't mind firmer shocks as long as the valving helps them go through chatter and absorb harder hits on the road.

On my 4Runner, I put the FJ's TRD suspension (blue-red) on. The shocks may be either rebadged 5100s or custom-valved versions...wish I knew. The entire setup is much firmer than stock but absorbs bumps/hits well and does well offroad....very well-matched. It is definitely firmer than my JK with the RRD shocks but works far better. Not the same type of vehicle, but I am hoping for a significant improvement in the JK here soon.
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Old 05-18-2013, 06:25 PM   #165
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Many cant run 5" caster with a driveshaft. Especially at 4"+ in ride height. The higher the lift the more angle that u-joint runs at. Caster adds to that angle.
I've settled some since the install which is letting me sneak my caster up a little higher. I was at 4*
Not sure where I'm at now. I can't do half turns with my Teraflex joints.
Tomorrow ill throw my DS back in and see what happens.
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Old 05-18-2013, 06:27 PM   #166
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That's where I am at now. Firm ride but small to medium bumps are absorbed very well. Potholes are another story but its to be expected with a solid axle.
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Old 05-31-2013, 06:49 PM   #167
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Update: In my case, the culprit was not the springs. The Rock Krawler RRD shocks were the offending culprits. Without the shocks, the springs were pretty soft. In fact, the Synergy springs may be just a bit stiffer. However, even though the Bilstein 5100s are slightly stiffer-feeling shocks that the RRDs, they are far superior in feel and damping. So (even though I prefer a softer feel) the Synergy springs and 5100s provide a slightly stiffer ride, the ride quality is far better. There is no comparison. If the RRD shocks are great on 2-doors normally, mine must have been defective.

I drove about 70 miles and the same roads/highways as the last few times, and took some rougher roads too. Small bumps and expansion joints were transmitted much less into the cabin. The shocks are just better valved and damped. It feels like a normal Jeep now. I can just drive through rough sections without bracing and gritting my teeth, and getting flung all over the place. While I would probably prefer OME shocks, the 5100s are fine and I'll use them. Their damping is really good.

Now I am debating changing out the RK control arms to MC ones...just for fun. I never want to deal with Rock Krawler again, even though the arms are just fine.
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Old 05-31-2013, 09:34 PM   #168
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Glad to hear you got everything worked out.
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Old 05-31-2013, 09:55 PM   #169
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Thanks! It is such a relief, and I enjoy driving the Jeep again. Been too long, and I am already looking forward to driving the Jeep tomorrow. I'll add a new post once and if I swap control arms. I just need to sort out the CB first, and also plan my wheeling trips all over Colorado. The snow is melting up high....
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Old 05-31-2013, 10:25 PM   #170
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I've got the 2.5" x-factor coming my way, different shocks though. Hopefully my install and experience is nothing like yours.
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Old 05-31-2013, 10:40 PM   #171
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Which shocks? Actually, they will all be fine. The Fox (and King especially) shocks will be stiffer. The 5100s and 5160s are firm. The OMEs and Ranchos are reportedly softer. Well, I have ridden in OME Jeeps...the ride is pretty nice.

My experience would have been much better if RK was not in denial, and insisting at each turn it was me because my "experience was so atypical"- which was crap. Thanks goodness they at least agreed to take the shocks back. To give my installer credit, he initially was convinced it was also the shocks, but Jeremy at RK eventually and mostly convinced him it was me.

All I will say is make sure your springs are marked with RK markings, are not rusted, and keep an eye on your bushings for a few months.

EDIT: If you want, measure your springs. I will do the same with mine and note it. Mine were the correct 2.5" springs (for sale now).
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Old 06-01-2013, 02:02 AM   #172
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Did you run the Bills before swapping the coils or did you swap both at the same time ?
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Old 06-01-2013, 02:41 PM   #173
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Drove it with the RK springs around the block....big difference just with the new shocks. It was evident from the first bump on the road. My RRD shocks had sucky damping. I already had the Synergy springs and prefer a slight rake so used them. I could have save money and reused the springs but you already know my position with anything RK. With the Synergy springs, I got about 3" front and back. So my RK springs were fine and are marked with RK markings. I have heard of someone else (local guy) getting unmarked springs though.

The Synergy 2.0 springs I used were two inches taller than the RK springs in front. So the tight coiling up top had 2-2.5 more coils than the RK. On the Jeep, it sits about a half inch inch lower than the RK did.

The rears were about .75 inch taller that the rear RK springs, and it does sit that much higher.
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Old 06-01-2013, 03:54 PM   #174
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Wow, this was absolutely riveting. I laughed....I cried and the ending was wonderful.
So glad you got your beloved Jeep back on track HK.
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Old 06-01-2013, 03:57 PM   #175
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Lol gotcha

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