Rubicon Express RE7144 User Manual

RUBICON EXPRESS 3290 MONIER CIR., RANCHO CORDOVA, CA. 95742 916-473-4600

INSTALLATION INSTRUCTIONS FOR:

RE7124 2 DOOR JK WRANGLER
RE7144 4 DOOR JK WRANGLER

4.5” SUPER-FLEX SHORT ARM SUSPENSION SYSTEM

Application Notes:

1) The transmission skid plate must be removed and will not be reinstalled due to drive shaft clearance.

2) It is necessary that a front CV drive shaft be used in conjunction with this lift on either 2 or 4 door models. It is also

Safety Warning:

Suspension systems or components that enhance the off-road performance of your vehicle may cause it to handle differently, on and off-road, than it did
from the factory. Care must be taken to prevent loss of control or vehicle rollover during sudden maneuvers. Failure to dr ive the vehicle safely may result
in serious injury or death to driver and passengers. We recommend you always wear your seat belt, drive safely and avoid quick turns and other sudden
maneuvers. Constant maintenance is required to keep your vehicle safe. Thoroughly inspect your vehicle before and after every off-road use.

Installation Warning:
All procedures described in these instructions were performed while the vehicle was properly supported on a vehicle lift. Use caution when
supporting the vehicle as removing and installing parts will change the vehicle center weight. Rubicon Express recommends that chassis support
jacks are always used at the front and rear of the vehicle during the installation of a suspension system.

We recommend that certified technicians perform the installations of our products. Attempts to install these products without knowledge or experience
may jeopardize the safety of the vehicle. These instructions only cover the installation of our products and may not include factory procedures for
disassembly and reassembly of factory components. Read instructions from start to finish and be sure all parts are present before disassembling the
vehicle. Included instructions are guidelines only for recommended procedures and in no way are meant to be definitive. Installer is responsible to insure a
safe and controllable vehicle after performing modifications. Do not perform test drives on public roads with partially completed installations. Always
double and triple check your work before use.

ESP WARNING NOTE: The 2007+ Jeep Wrangler JK is equipped an Electric Stability Program (ESP). This system is designed to help control
the vehicle in times of uncertain traction conditions and roll stability. Due to the complex nature of this program Rubicon Express strongly
suggest that after lifting the vehicle it is returned to the dealer for a computer “flash” to re address tire size and proper ESP control settings.
Rubicon Express also recommends that you become familiar with the ESP controls and how the different level of settings can help you to keep
better control of your vehicle.

recommended that a rear CV driveshaft is used on both 2 and 4 door models.

WHEEL NOTICE: If using factory wheels it will be necessary to purchase 1.5” wheel spacers to provide proper clearance
to suspension components. Otherwise aftermarket wheels with 4.5” back space measurement will be required.

KIT CONTENTS

RE1143 Gen2 Sway Bar Disconnects
RE1157 Rear Sway Bar End Links
RE1371 (2 Door) RE1372 (4 Door) Front 4.5” Coil Springs
RE1376 (2 Door) RE1377 (4 Door) Rear 4.5” Coil Springs
RE1380 2” Front lower bump stops
RE1387 Rear bump stop pad
RE1530 Front SS brake line set
RE1540 Rear SS brake line set
RE1607 Rear Lower Track Bar Bracket
RE1675 Front HD Adjustable Track Bar
RE1680 Front track bar bracket
RE2610 JK drag link
RE3750 JK Super-Flex Front Lower fixed arms
RE3752 JK Super-Flex Front Upper Adjustable arms
RE3755 JK Super-Flex Rear Lower fixed arms
RE3757 JK Super-Flex Rear Upper Adjustable arms

TYPICAL TOOLS REQUIRED

Basic mechanics hand tools. Optional floor jack, jack stands, wheel chocks for ground installation.

RE7123B Page 1 of 6

PRE INSTALLATION NOTE:

Control arm bushings are pre-lubed during init ial assembly at Rubicon Express. As general maintenance the control arm bushings should be
lubed with a silicone base grease

The Super-flex joints are also pre-lubed during initial assembly at Rubicon Express. As general maintenance the super-flex joints should be
greased as needed and the outer spanner nut tightened on the joint. Any type of grease will work on the Super-flex joints. Spanner nut
tools are available through Rubicon Express (RE3771 & RE3772) if needed for tightening of the joints.

INSTALLATION OVERVIEW

The installation process can be broken down into the following tasks:

1. Installation of front control arms, track bar and bracket, coil springs and bump stops, shocks, and brake lines, Sway bar
disconnects.

2. I nstallation of rear control arms, track bar bracket, bump stop s, coil springs, shocks, brake lines, and sway bar links

3. Final detailing and adjustments.

Step 1 – Front arm and component installation

A. With the vehicle and axle properly supported prepare the front end suspension component installation by removing the following

items; shocks, sway bar links, and track bar. These items will not be reinstalled on the vehicle.

B. Remove the brake line attaching screw at the frame but keep the brake system sealed at this time. Unclip the abs wires from

there attaching points for additional lengt h. Lower the breather hose clip on the shock tower approximately 4”.

C. Lower the axle and remove both coil springs.

Front arm Installation

A. Remove the passenger’s side factory upper and lower control arms.

NOTE: It will be necessary to cut the upper control arm bolt off at the frame end to remove the passenger upper

front arm. This is due to the bolt being installed from the inside out prior to the exhaust installation from the factory.

Alternatively the head pipe assembly can be removed to pull the bolt out of the frame bracket. If choosing to unbolt the
head pipe be sure to disconnect all O2 sensors before removal. (photo 1)

B. Set the upper arms to an initial setting of 18.75” center to center. With the supplied ½” bolt install the Super-Flex end of the arm

into the frame pocket for the upper control arm and the fork of the arm over the bushing mount on the axle. Use the factory
hardware thru the fork end of the arm.

C. Using the factory hardware install the lower arm into the frame pocket and the flex joint to the axle. The bend in the arm will be

towards the center of the vehicle allowing for proper tire clearance. Both arms need to have the zerk fittings facing up to avoid
trail damage.

D. Repeat steps A – C on the driver’s side.
E. Loosely assem b le all hardware on the control arms. When the vehicle is back on the ground under its own weight to rque upper

control arm bolts to 70ft/lbs and lower contro l arm bolts to 90 ft/lbs

NOTE: It will be necessary to re-adjust the up p e r arm s d uring the final check to properly set the castor angle.

as needed. Silicone base grease can be purchased at your local auto parts store.

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