there are many causes for this. You should consult a ASE trained technician.
The amplitude of the sound waves. (the distance it makes the particles move)
wind/hill/compressed air or lots of gear
Tthe radio waves move in weird directions to create sound.
The neutral position puts a cars transmission out of gear and therefore makes the car roll.
truck start shift is hard to move in gear
slipping clutch? get a new one
No it does not.
burnt motor or striped gear. can you move them by hand?
The strings that are on the guitar make the sound play. If you think about it, almost every instrument something vibrates to make a sound. In a saxophone, when you blow into the mouthpiece, it makes the reed move. When you hit a violin, it causes the string to move.
the gears probably arent meshing when you change gears. Either the clutch is bad, or you need a new gearbox.
makes it move faster meaning a more high pitched sound
Maybe a dog, or something that makes a funny sound.