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Q: Steering system on 1999 Mercury Grand Marquis

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
left turn steering occasionally is like manual steering with a knock.
(1) Answer
This may be an indication that the steering rack is failing, or another issue with the power steering and/or suspension. It really will need to be inspected to know for sure. Make sure the power steering fluid level is OK.