How do manual car gearboxes work?

Question

I’m a simracer, but I want to learn more about cars and eventually be able to work on them to some extent.

In: 1

Answer 1

So there are different gears in the gearbox, these combine to have different ratios of power. Like converting 10 engine rotations, into 1 turn of the driveshaft/wheels.
The clutch disconnects the drivetrain from the engine so that the gears can move into place.

https://www.reddit.com/r/explainlikeimfive/comments/oqrtvy/eli5_how_does_a_manual_transmission_work/ here is another thread on it.