Q: why do I hear a click by the gear shift when I apply the brake pedal on 1999 Lexus LS400

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and my 1999 Lexus LS 400
(2) Answers
There is a lock that prevents removing the shifter from "park" if you do not have your foot on the brake. The click you feel/hear is the lock disingaging to allow you to move out of "park".