350 S. St. Charles St. Jasper, In. 47546
Ph. 812.482.2932 Fax 812.634.6632
www.ridetech.com
Part # 11163699
67-69 GM “F” Body & 68-74 GM “X” Body Upper StrongArms
Components:
1 90002390 Drivers side arm
1 90002391 Passenger side arm
2 90000908 Ball joint (includes boot, grease fitting, castle nut & cotter pin)
2 90000914 Caster Adjustable Cross shaft
2 70010826 Delrin Bushing – no ledge
2 70010827 Delrin Bushing – small ledge
4 70010759 Delrin Bushing – outer
4 70010883 Zero Offset Caster Slugs
2 90001083 Medium bump stop w/ hardware
Hardware:
4 99163001 Stainless Washer Cross shaft to bushing
4 99622005 5/8” SAE crimp locking nuts Cross shaft to bushing
1. On some cars, to remove the upper
control arm you must remove the bolts,
which are pressed into the frame. We
made this slide hammer adapter (a nut
with a piece of angle iron welded to it)
to aid in removing the bolts.
2. Fasten the upper arm to the frame
using the factory hardware. Reinstall
the current alignment shims, but
vehicle must be realigned. This arm
was designed with an extra 2 degrees
of positive caster with the centered
caster slugs. Additional caster slugs
are available if more or less caster is
desired. By changing the caster slugs
you can achieve the caster setting you
are wanting without having to run a lot
of shims. Caster is explained of the
next page.
3. Drop ball joint down through upper
arm. Slide ball joint boot over stud,
then place boot retainer over the boot.
Clamp assembly tight w/ the hardware
supplied.
4. Fasten the ball joint to the spindle
w/ the new castle nut and cotter pin
supplied.
5. Tighten the cross shaft nuts enough
to create drag on the delrin bushings,
the arm should still move.
6. Lubricate the ball joint w/ standard
grease.
Installation Instructions
Driver Side Top View
These Strong Arms come equipped with a changeable caster slug setup. This allows you to add or
remove caster from the front suspension, if desired. The caster slugs that come in the kit are setup to
put the control arm in the centered position, which is approximately 3 degrees of caster. The caster
slugs allow you to add or remove caster without having to use a stack of shims. If more or less caster
is desired, optional caster slugs can be purchased from your Ridetech dealer or Ridetech.
Caster Explained:
To understand caster you need to picture an imaginary line that runs through the upper ball joint and
extends through the lower ball joint. From the side view the imaginary line will tilt forward or
backward. The tilting of this imaginary line is defined as caster.
Caster is measured in degrees by using a caster camber gauge. If the imaginary line described above
tilts towards the back of the car, at the top, then you will have positive caster. If the imaginary line tilts
forward then you would have negative caster.
Positive caster provides the directional stability in your car. Too much positive caster will make the
steering effort difficult. Power steering will allow you to run more positive caster. Negative caster
requires less steering effort but can cause the car to wander down the highway.
Item #
Description
Qty.
1.
Passenger side arm
1
1.
Driver side arm (Shown)
1
2.
Extension stop
2
3.
Ball joint
2
5.
3/8”-16 Nylok nut & washer
2
6.
1/4"-28 x 7/8” hex bolt
8
7.
1/4"-28 nut
8
8.
Inner Delrin bushing w/ledge
2
9.
Inner Delrin bushing no ledge
2
10.
Outer Delrin bushing
4
11.
Stainless washer
4
12.
5/8”-18 lock nut
4
13.
Caster Adjustable Cross shaft
2
14.
Caster Slug
4
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