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A typical rack and pinion steering gear assembly consists of a pinion
shaft and bearing assembly, rack gear, gear housing, two tie rod
assemblies, an adjuster assembly, dust boots and boot clamps, and
grommet mountings and bolts. When the steering wheel is turned, this
manual movement is relayed to the steering shaft and shaft joint, and
then to the pinion shaft. Since the pinion teeth mesh with the teeth
on the rack gear, the rotary motion is changed to transverse movement
of the rack gear. The tie rods and tie rod ends then transmit this
movement to the steering knuckles and wheels.
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