JKS 6155 User Manual
Product: Adjustable Control Arms
Part Number: JKS6155
Applications: Wrangler JK, 2007+ (rear only)
INSTALLATION
INSTRUCTIONS
517-278-1226 • tech@jksmfg.com • www.jksmfg.com
491 W. Gareld Avenue, Coldwater, MI 49036
Welcome
CONGRATULATIONS on purchasing a set of new Adjustable Control Arms from JKS Manufacturing. We are committed to providing you with the best products available and
your satisfaction is our rst priority.
Tools Required
Hydraulic Floor Jack and Jack Stands
Metric/Standard Socket Wrench Set
Torque Wrench
Tape Measure
Anti-Seize Lubricant
Hand-Pump Grease Gun
Moisture Resistant Marine Style Grease
Heavy Duty Ratchet Strap *
Factory Service Manual (recommended)
* Asterisk denotes tools that are not required for some applica-
tions. Thoroughly read instructions rst to determine which tools
will be required for your application.
ATTENTION INSTALLER
PLEASE READ these Installation Instructions carefully,
and save them for future reference, as they contain important installation and maintenance information.
Important
SUSPENSION COMPONENTS THAT HAVE RUBBER
BUSHINGS must be tightened with vehicle on level
ground and at normal ride height. The springs must
be supporting weight of vehicle when the hardware is
torqued.
RUBBER BUSHINGS MUST NEVER BE LUBRICATED,
as doing so will impair performance and longevity.
COMPATIBLE WITH original 4-link suspension con-
guration and vehicle ride height up to 6.0”.
REFER TO FACTORY SERVICE MANUAL for information and procedures not covered in these instructions.
Install Adjustable Control Arms ONE AT A TIME for easi-
est alignment of mounting hardware.
Installation
1. REMOVE ORIGINAL LOWER
SUSPENSION ARM
Raise and support the vehicle chassis with jack
stands positioned in front of the rear lower suspension arm brackets.
Raise the axle housing back into position and sup-
port with a hydraulic jack. HINT: The axle housing
should be evenly supported and the suspension
at normal ride height. Do not attempt removal or
installation with the suspension extended, or the
axle drooped, as this will place tension on suspension arm mounting hardware.
JKS 6155JKS Adjustable Control Arm Installation
Page 1
Remove the lower suspension arm bolt and nut
from the axle housing bracket. Retain the original
mounting hardware.
Remove the bolt and ag nut from the chassis rail
bracket. Retain the original mounting hardware.
Remove the original lower suspension arm from
the vehicle.
2. SET CONTROL ARM LENGTH
Adjustable Control Arms are fully collapsed when supplied
from JKS and must be adjusted to the desired lengths
before installation.
The working length of each lower Control Arm can be
increased (up to 2.625” longer), decreased (up to 0.75”
shorter), or exactly the same as the OE suspension arm.
4. TIGHTEN MOUNTING HARDWARE
Once both Adjustable Control Arms have been
properly installed, lower the vehicle to the ground
until coil springs are supporting the full weight of
vehicle.
Using a torque wrench, tighten all mounting hard-
ware to 125 ft-lbs.
5. POST-INSTALLATION INSTRUCTIONS
Adjustable Control Arms are supplied pre-lubri-
cated, although it will be necessary to add more
grease after they have been adjusted and installed
on the vehicle. Refer to Maintenance section for
specic lubrication instructions.
Determine ideal Control Arm length for your ap-
plication by considering factors such as:
 Length of OE suspension arm
 Tire Clearance
 Pinion Angle
Rotate adjustable end of Control Arm until the
desired length is achieved.
Adjust corresponding Control Arm to exact same
length.
3. INSTALL CONTROL ARM
Apply anti-seize lubricant to bolt threads of original
mounting hardware.
Mount the non-rotating (BLACK) end of Adjustable
Control Arm to the chassis rail bracket.
Install the original mounting bolt and ag nut.
Finger tighten the bolt. DO NOT torque mounting
hardware until instructed.
Mount the rotating (GOLD) end of Adjustable
Control Arm to the axle housing bracket with the
greaseable tting facing up.
Install the original mounting bolt and nger tighten
the nut. DO NOT torque mounting hardware until
instructed.
HINT: If mounting bolt is difcult to install due to misalignment of Control Arm bushing with mounting bracket, either
(1) adjust height of axle housing with hydraulic jack, (2)
move axle housing into position with a heavy-duty ratchet
strap, or (3) temporarily disconnect track bar until mount-
ing holes align.
Maintenance
Control Arms should be greased regularly as part of
vehicle maintenance schedule. Lubricate using moisture
resistant marine style grease and a hand-pump grease
gun. DO NOT use a pneumatic grease gun. Add grease
slowly until resistance is felt. The internal spring-loaded
seal can be damaged by forcing too much grease into
Control Arms.
©2013 JKS Manufacturing, Inc & Aftermarketing, LLC
Revision Date 10/11/2013
2 Page
JKS 6155
JKS Adjustable Control Arm Installation
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