The Lexus power steering rack works slightly different from the manual system. The design of the rack differs in a car with power steering. Unlike the manual steering, the power steering rack has a cylinder with a piston. The piston inside the rack is moved by power steering fluid. There are two fluid lines on each side of the piston. One line supplies high pressure fluid to control the movement of the piston, as the piston moves the rack to turn the wheels. The fluid supply decides the movement of the wheels. This is how smooth steering and wheel coordination is achieved.

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