JKS 7100 User Manual
INSTALLATION
INSTRUCTIONS
517-278-1226 • tech@jksmfg.com • www.jksmfg.com
491 W. Gareld Avenue, Coldwater, MI 49036
Welcome
Product: Adjustable Upper Control Arms
Part Number: JKS7100
Applications: Wrangler TJ, 1997-06 (front only)
Grand Cherokee ZJ, 1993-98 (front only)
Grand Cherokee WJ, 1999-04 (front only)
Cherokee XJ, 1984-01 (front only)
Comanche MJ, 1986-92 (front only)
Tools Required
Metric/Standard Socket Wrench Set
Torque Wrench
Tape Measure
Anti-Seize Lubricant
Hydraulic Floor Jack & Jack Stands
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.
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.
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 the weight of the vehicle when the hardware is torqued; or else ride comfort could be affected
and premature bushing wear may occur.
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
easiest alignment of mounting hardware.
Installation
1. REMOVE ORIGINAL FRONT UPPER
SUSPENSION ARM
Raise and support the vehicle chassis with jack
stands positioned behind the front lower suspension arm brackets.
Raise and support the front axle housing with a
hydraulic jack. HINT: The axle housing should be
evenly supported, with 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.
Remove the front upper suspension arm nut and
bolt from the axle housing bracket. Retain the
original mounting hardware.
JKS7100JKS Adjustable Control Arm Installation
Page 1
Remove the nut and bolt from the chassis rail
bracket. Retain the original mounting hardware.
Remove original front upper suspension arm.
Inspect the condition of the rubber suspension
bushing that is pressed into the axle housing
bracket and replace if cracked or worn.
NEW OE RUBBER BUSHINGS for the upper
suspension arm brackets on front axle housing are
available from JKS as PN 52038025.
HINT: Special factory tools PN 7932/7603/7604
(Miller Special Tools, 800-801-5420) are useful for
removing and installing OE rubber bushings.
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 3.75” longer), decreased (up to 0.25”
shorter), or exactly the same as the OE suspension arm.
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.
4. TIGHTEN MOUNTING HARDWARE
Once all 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 the mounting hard-
ware to the factory torque specications for your
vehicle.
Wrangler TJ, 1997+
 Tighten nut at FRONT axle and chassis brackets
to 60 ft-lbs.
Grand Cherokee ZJ, 1993-98
Tighten nut at FRONT axle and chassis brackets
to 55 ft-lbs.
Grand Cherokee WJ, 1999-04
Tighten nut at FRONT axle and chassis brackets
to 60 ft-lbs.
Cherokee XJ, 1984-01
Tighten nut at FRONT axle and chassis brackets
to 55 ft-lbs.
Comanche MJ, 1986-92
Tighten nut at FRONT axle and chassis brackets
to 55 ft-lbs.
5. POST-INSTALLATION INSTRUCTIONS
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 with the
greaseable tting facing UP.
Install the original mounting bolt and nger tighten
the nut. DO NOT torque mounting hardware until
instructed.
Mount the rotating (GOLD) end of Adjustable Con-
trol Arm to the axle housing bracket.
Install the original mounting bolt and nger tighten
the nut. DO NOT torque mounting hardware until
instructed. H I NT: 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
mounting holes align.
2 Page
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.
Have vehicle professionally aligned before driving
on highway.
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
JKS7100
JKS Adjustable Control Arm Installation
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