1991 Mitsubishi Verada

Steering problem
1991 Mitsubishi Verada 6 cyl Front Wheel Drive Automatic

I recently baught this vechile. I need to get a few things done to it to pass rwc. The rwc said the steering rack needed to be replaced. I'm confused as to how, ( reasons ) There is no oil dropping onto the ground, the steering doesn't make any noise at low speed or high. The steering is very smooth and light. How can I tell if it does need replacing, and signs to look out for.
December 20, 2009.

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