When you change gear, you are moving the gear selector lever to a different position in the gearbox. This changes the gear ratio between the engine and the wheels, which in turn changes the speed of the car.
If you do not press the clutch fully before changing gear, the gear selector lever will not be able to move to the desired position. This will cause the gears to grind against each other, which can damage the gearbox.
In addition, if you do not press the clutch fully before changing gear, the engine may stall. This is because the engine is still engaged with the wheels when you change gear, and when you release the clutch the engine will suddenly stop turning. This can cause the car to jolt forward, which could be dangerous if you are in traffic.
Therefore, it is very important to press the clutch fully before changing gear. This will ensure that the gearbox is not damaged and that the car does not stall.
