Forum Discussion
adayjk
Jul 11, 2013Explorer
DaHose wrote:
I also don't understand how they can adjust caster.
Jose
On the most common E series Ford chassis it is done with eccentric ball joint inserts. The upper ball joint stud fits into a hole that is far too big for the stud alone. The insert fills the remaining gap and had the small hole for the ball joint stud drilled off center. Other vehicles work differently.
As far as the toad: many vehicles now use SAI instead of caster to control straight line stability and steering wheel return to center. More caster many not be possible or adviseable. Some newer cars may only have a degree or two of positive caster, and that works fine. Any newer alignment machine can show SAI and verify that it is in specs after camber is set. In that respect a good alignment may still verify SAI problems, even though SAI is not typically "adjusted". SAI problems that still exist after a proper alignment (camber) typically indicate bent parts.
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