Sometimes referred to as Rack and Pinion steering racks, due to the steering unit
consisting of a main rack shaft with a small pinion. The pinion shaft is attached to the vehicles
steering wheel via linkages. The pinion inside the steering rack has small
teeth that mesh into teeth on the main rack shaft. This converts the steering wheel rotation
into lateral movement that then moves the road wheels to steer the vehicle as you drive.
Manual steering racks: wear and tear; resulting in free-play.
Power steering racks: leaking fluid out of the unit.