JKS1610
JKS Control Arm Installation
2 Page
Remove the original lower suspension arm from
the vehicle.
Proceed to step 2. Complete installation on one
side before starting other side.
2. SET CONTROL ARM LENGTH
Determine the ideal arm length for your application
by considering factors such as:
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Tire Clearance
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Steering Clearance
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Pinion Angle / Caster
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Factory length is 22-5/8"
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Max. length is 24 3/8"
Set both control arms to the same length.
Lengthening the arms will increase caster and
reduce pinion angle.
3. INSTALL CONTROL ARM
Apply anti-seize lubricant to bolt threads of original
mounting hardware.
Establish control arm orientation.
The arms
should be mounted so that the bend goes inward
(away from the tire) and the rubber bushing end
mounts to the axle.
Mount the control arm to the axle housing bracket.
Install the original mounting bolt and finger tighten
the nut. DO NOT torque mounting hardware until
instructed.
Mount the control arm to the frame rail bracket so
the grease fitting is up on the flex eye. Install the
original mounting bolt and nut. Finger tighten the
bolt.
HINT:
If mounting bolt is difficult to install due to misalign
-
ment 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.
4. TIGHTEN MOUNTING HARDWARE
Once both 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.
Tighten jam nuts using JKS1695 or equivalent.
5. POST-INSTALLATION INSTRUCTIONS
Installing longer lower control arms will affect the
vehicle alignment by adding more caster. This
may also slightly affect the steering wheel posi-
tion, making it off-center. It is important that the
steering wheel is centered to avoid adverse affects
on the vehicle's electronic stability control (ESC)
system. JKS recommends having the alignment
check by a qualified alignment shop.
Check mounting hardware for proper torque.
Check hardware after 500 miles of use.
Maintenance
Control arm flex ends should be greased regularly as part
of vehicle maintenance schedule or after every 4-wheeling
trip. Lubricate using marine grade grease. Rubber bush-
ings require no maintenance.
©2013 JKS Manufacturing, Inc & Aftermarketing, LLC
Revision Date 02/03/2014