Why is "to switch gears" used for "to change topic"?

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Track title: Ocean Floor

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Chapters
00:00 Why Is &Quot;To Switch Gears&Quot; Used For &Quot;To Change Topic&Quot;?
00:52 Accepted Answer Score 10
01:19 Answer 2 Score 4
01:49 Thank you

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Tags
#etymology #idioms

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