JKS 7150 User Manual
Product: Adjustable Upper Control Arms
Part Number: JKS7150
Applications: Wrangler JK, 2007+ (front 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 Jacks (two required)
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.
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.
ATTENTION INSTALLER
Install Adjustable Control Arms ONE AT A TIME for easi-
est alignment of mounting hardware.
Installation
1. REMOVE ORIGINAL UPPER
SUSPENSION ARM
Raise and support the vehicle chassis with jack
stands positioned behind the front 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.
JKS7150JKS Adjustable Control Arm Installation
Page 1
Remove the electrical clip from the suspension
arm clevis bracket if equipped.
Remove the upper suspension arm nut and bolt
from the axle housing bracket. Retain the original
mounting hardware.
Remove the nut and bolt from the chassis rail
bracket. Retain the original mounting hardware.
IMPORTANT: To remove the passenger side bolt from
the chassis, it will be necessary to raise the engine
according to the following instructions.
 Position a second hydraulic jack beneath
mounting ange of engine oil pan. Support
engine using a suitable block of wood (2x4
or larger) to distribute weight across oil pan
bolts. DO NOT attempt to lift the engine by
engine oil pan.
 Carefully raise the hydraulic jack just enough
to remove the weight of the engine from the
engine mounts.
 Locate the passenger side engine mount
bracket and remove the four (4) bolts that
secure it to the engine block.
Determine ideal Control Arm length for your ap-
plication by considering factors such as:
 Length of OE suspension arm
 Tire Clearance
 Pinion Angle / Caster
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 rotating (GOLD) end of Adjustable
Control Arm to the chassis rail bracket with the
greaseable tting facing up.
Install the original mounting bolt from inboard side.
Bolt threads should point outboard.
IMPORTANT: Passenger side bolt must be installed
with engine in the raised position to provide sufcient
clearance around exhaust pipe.
 Slowly raise the hydraulic jack approximately
1-2 inches until the passenger side control
arm bolt clears the interfering exhaust pipe.
 Continue following instructions with engine in
raised position and begin Control Arm instal-
lation with passenger side rst.
Remove the original upper 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 upper Control Arm can be
increased (up to 3.625” longer), decreased (up to 0.5”
shorter), or exactly the same as the OE suspension arm.
 With the Control Arm positioned in the chas-
sis rail bracket, insert the original bolt into the
mounting hole.
 Carefully lower the hydraulic jack until the
passenger side engine mount support bracket
is realigned with the engine block.
 Install the four (4) original bolts into the cor-
responding mounting holes and tighten to 45
ft-lbs. using a torque wrench.
 Lower the hydraulic jack and remove block of
wood from beneath engine oil pan.
Install the original mounting nut and nger tighten.
DO NOT torque mounting hardware until instructed.
Mount the non-rotating (BLACK) end of Adjustable
Control Arm to the axle housing bracket.
Install the original mounting bolt from inboard side.
Bolt threads should point outboard.
Install the original mounting nut and nger tighten.
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.
2 Page
JKS7150
JKS Adjustable Control Arm Installation
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