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Old 04-18-2010, 11:03 PM   #1
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So i've found myself in a predicament

Many of you have helped me out on here (much appreciated) and now I just want some honest advice..I know this is long, thanks for your patience in advance....Please read through the following and offer your input

I'm not happy with my Rough Country 3.25" lift, as I said last week in another thread. My after market rear bumper, tire carrier, and 35" spare is causing ALOT of rear end sag. Alot more than I anticipated. Before I bought my lift kit RC customer service told me that after market heavy duty bumpers would cause between .25" and .5" of sag. Well measuring from the center of the rim to the bottom of the fender flare pre and post lift.... RC 3.25" lift kit has given me 2.75" in the front and only 2" in the rear. Thats 1.25" of sag in rear end!!! The kit has only been on about a month. I've gone wheeling once!

I called RC and they now say that amount of sag sounds about right for the extra weight of the bumpers. I have decided I need to completely swap out the springs and possible shocks as well and just go with a different company. I originally thought maybe just swap the springs out with OME but when calling Quadratec and Rocky road.com.....they said the OME (altho great quality) will only give about 2" to 2.5" of lift which wont be enough to help any.

I have a complete set of adjustable control arms, adjustable front track bar, rear track bar relocation bracket on my rig in addition to the RC lift kit.

So here are my questions for you guys:

1) Should I go with 4" coil springs of a different company anticipating that it will sag some. I picked the RC lift to begin with because I liked the advertised height.

2) Will I have to also replace the shocks or will the RC 2.2 series shocks work with 4" coils from which ever company i choose?

3) What brand springs do you guys recommend, keeping in mind I have the added weight.

I'd like to avoid having to replace the drive shafts with double u joint ones (thats part of the reason I chose a 3.25" lift)...but if I have to I will replace them after installing the new 4" springs.

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Old 04-19-2010, 12:57 PM   #2
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I hate to say it, but if you'd have read my threads before, you were warned- RC coils are JUNK.
Is the rear TB bracket by RC? If so, GET RID OF IT! They bend if you look at them funny.

My advice is to get rid of EVERYTHING RC. I've heard nothing good, and my experiences with them tell me not to expect anything but garbage.
Since you're in NY, Rock Krawler is in Green Island, NY. They will hook you up if you do cash-and-carry, and they'll help you out big time. They were great to me, and I saved a TON over their advertised prices by showing up with cash in hand
Their 3.5" kit fits my 35's NICELY, with room for monster flex. It rides and handles VERY well with Bilstein 5100's. I got ~4" of lift (after a BIT of settling) with steel bumpers and a winch up front. Check out my post on the lift- I put a TON of info in there.

Any time you increase height, your current shocks SHOULD be upgraded so they don't limit your flex. Going down the road, with a 2.5" lift shock and 4" springs, you likely won't ever see a problem. On the trails, you may blow a shock, but you WILL find them limiting your flex/travel.

I DID have to replace my front OEM driveshaft, but some people get away without doing that for a while. Above 3" with a 2-door, you WILL have to at some point. RK also got me a bit of a discount on a Tom Woods shaft. I've been very pleased so far- no extra NVH (Noise, Vibration, Harshness), and no more clicking! I'd highly recommend rear upper control arms (to adjust the rear pinion angle).
Rock Krawler's 3.5" x-factor kit moves the rear axle back ~1" (.9 for me), which actually improves the rear driveshaft angles. So far, mine is about the same as it was stock, and ZERO issues so far
Mark W.

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Old 04-19-2010, 03:43 PM   #3
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Have you considered just adding a spacer above the rear coils to level you out and make up for the sag? Probably the cheapest way to address the issue if you are happy with the rest of the set up you have.
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Old 04-19-2010, 05:25 PM   #4
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Cheap solution= spacers
Right solution= Call RK and ask about their 3.5" springs

Sorry to hear of your woes.
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Old 04-19-2010, 05:27 PM   #5
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On the upside, you can always sell the stuff you have towards getting better gear. Did you keep your OEM parts? Mark W.
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Old 04-20-2010, 11:59 AM   #6
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Yes I kept all my OEM parts, bumpers, control arms, ect.... I actually did some research on this on my own yesterday. I called Rock Krawler (very helpful), Rubicon Express, SkyJacker, and Teraflex.... Speaking to Chris at Rock Krawler he offered alot of info I didn't know which helped me asking the right questions.

Each companies coils have a lbs per inch compression rate, front springs and rear springs are always different and the rear from what I found always has a higher weight rating. Here are the specs on the different companies:

Teraflex - 2.5" rear coil springs for a 4 door JK - 200lbs per inch compression rated - cost $233.99 per pair (the rep said using this on a 2 door would give about 3" of lift, I don't think I'll go this route)

Rock Krawler - 3.5" rear coil springs for a 2 door - 210 lbs per inch compression rated - cost 149.99 per pair

Rubicon Express - 3.5" rear coil springs for a 2 door - 230 lbs per inch compression rated - cost 174.95 per pair

SkyJacker - 2.5" inch for a 4 door which rep said would give a 2 door more lift. Didn't have specs and said he'd call me back. I haven't heard at this point.

Rough Country - 2.5" rear coil springs (the ones I have on my Jeep now) - 178 lbs per inch compression rate.

This seems to be the explanation as to my sag issue. I estimated that the rear bumper, spare tire rack, and 35" mud tire probably add up to about 200 lbs of extra weight. The 35" mud tire without rim weighs 65 lbs alone.

My only real question now is to go with Rock Krawler or Rubicon Express. I decided to go with a 3.5" coil, anticipating it is going to sag at their rates. With the .75" coil spacer I have already, it should settle in right about where I want it.

So what do you guys think, Rock Krawler or Rubicon Express.

As for the shock issue, the 2.2 shocks are 24"-14" travel distance. I believe....Where its going to hurt me is at the maximum droop (opposite of articulation). I'll deal with that and drive shaft possible issues when I have more $$$.
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Old 04-20-2010, 12:11 PM   #7
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Originally Posted by thaduke2003 View Post
I'd highly recommend rear upper control arms (to adjust the rear pinion angle).
Mark W.

I have a complete set of upper and lower, front and rear adjustable control arms.

And I should add I plan to swap out all the springs, front as well
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Old 04-20-2010, 05:28 PM   #8
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Well, my money went to RK, and wouldn't go anywhere else, even if they weren't only an hour away. Their guys know their stuff, and they wheel the piss out of everything they sell. Talk to Jeremy over there- Chris is a good guy, but Jeremy's the dude who can do the deals for parts if you show up at their door- Mark W.
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Old 04-20-2010, 05:35 PM   #9
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Jeremy is a cool guy. Met him once in Phoenix. He does wheel his rig hard. Rock Krawler is a great company that makes some awesome products, you won't be disappointed.
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Old 04-21-2010, 11:48 AM   #10
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Maybe I'll drive out there...its north of Albany? I think it's about a 2.5 hour drive for me to Albany... Wonder if its worth it or if I should just order it over the phone
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Old 04-22-2010, 08:30 AM   #11
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As I said, if you show up to purchase, they hook you up. Even more if you do it with cash (using credit cards costs money, ya know). WELL worth the trip- trust me. I won't advertise how much, but worth the trip- not to mention, they're cool guys, and will take good care of you. I never fail to learn something from a trip up there- Mark W.
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Old 07-06-2011, 09:36 PM   #12
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I have had similar issues with my RC lift. I have a 4 inch lift and my jeep sags in the rear but only on the right side. Think maybe one of my coils is crushed a little. I was actually looking around for replacement coils (if anybody has any 4 inch lift coils laying around that they wanna get rid of). Another thing I've had trouble with is my rear anti sway bar has the bolt on lift bracket. If the bolt ever gets loose there is just enough slop in it to make a hell of a sway in the rear. I agree now that RC is garbage, but right now I can't afford to scrap it and start over.

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