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Chapter III Operation
Offset Cams and Bushings
Many Ford 2-wheel drive trucks and many Ford/GM/
Dodge 4-wheel drive trucks utilize offset sleeves and
inserts around the upper or lower ball joints to adjust
the caster and camber angles.
The program compares the current reading for caster
and camber with the preferred specification, displaying
the meters on-screen for reference. The required
sleeve/insert to correct the angles is shown below the
meters, along with the orientation of the slot. Proper
orientation of the slot insures the correct amount
of caster and camber is obtained from the sleeve/
insert.
The calculations assume the current sleeve/insert
is a ZERO (no offset). If it is not, examine the slot
orientation to determine if the previous installation
corrected camber or caster. Enter the value of the old
sleeve/insert in the box below either caster or camber,
whichever most accurately reflects the orientation of
the slot.
Note:
Whenever there is a sleeve/insert installed
that is not zero, it is difficult to determine
its affect on the calculation of the new
required sleeve/insert. It is a good idea
to have a few zero sleeves available to
install in the truck and re-measure caster
to get a true initial reading.
Cradle Adjust (Optional Advanced Feature)
Cradle adjustment is a growing necessity for front wheel
drive vehicles. Many front wheel drive vehicles are
designed where the engine cradle also serves as the
attachment point for the lower pivots of the suspension
system. This assembly is bolted to the sub-frame as
a unit from the bottom of the vehicle. The assembly
must be properly aligned with the sub-frame to assure
that front alignment is maintained.
A closer look shows that the lower control arms are
bolted to the engine cradle. The control arm is attached
to the spindle through the lower ball joint. The strut is
attached to the top of the spindle and is then attached
to the body via the upper strut mount to complete the
suspension steering axis.
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