What kind of noise? It could just be the park lock solenoid clicking when it releases to engage drive, this wouldn't come from the gearbox though, it would be from the gear selector unit under the centre console.
It is a fairly basic transmision. A locking mechanism (clutch dog) is moved by a cable amd a lever to change from forward gear to reverse, with a neutral inbetween. It is linked to the throttle cable so you can't jam it in reverse while the engine is at full rpms.
effort
yes
same, identical
Up your bum.
The lever itself is any rigid item, it should be long, rigid and strong. To work it needs a Fulcrum. A rock or similar thing will do. You take your Lever, place it under the object to be moved, place the lever over the Fulcrum, then push the lever to move your object.
'Mechanical Advantage' of a 3rd class lever is always less than 1. Force on the resistance is less than the effort force. Distance moved by the load is greater than distance moved by the effort. Eg: fishing pole.
Lever, simple machine machine, arrangement of moving and stationary mechanical parts used to perform some useful work or to provide transportation. From a historical perspective, many of the first machines were the result of human efforts to improve war-making capabilities; the term consisting of a bar supported at some stationary point along its length and used to overcome resistance at a second point by application of force at a third point. The stationary point of a lever is known as its fulcrum. The term lever is also applied to a projecting piece that is moved to operate or adjust inner machinery, such as a lever moved to the right or left to switch electric current on or off or to adjust the size of the opening of a shutter in a camera.
third class
A fault in which the hanging wall has moved upward relative to the footwall
on an a manual transmission, just grip the shift lever.
Depends on the gun. It is usually a lever or button that gets moved from one position to another,