Hi, my name is XXXXX XXXXX I will be glad to help you with this problem. There is no adjustment for the steering rack. If you have excessive play in the rack it will need to be replaced. You should check the steering shaft between the steering column and the rack. Often times it's the shaft that wears and not the steering rack. The steering tie rods that lead from the rack to the wheels can also develop looseness and cause excessive play. If you are certain that the play is in the rack itself and not in the steering shaft or in the steering tie rods the rack will need to be replaced.
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