To make a large, thin gear on a shaft with very small
gear teeth mesh without wobbling, run in both directions, and control dials and pointers several gear sets away without much play or lash requires a level of sophistication in metallurgy, machine design and precision machining on a level with the concept, design and purpose of this incredible mechanism.
Different car speeds (and thus, frequencies of
the gears teeth meshing) will increase and decrease the intensity of the sound as it passes through different «Harmonics» - http://en.wikipedia.org/wiki/Harmonic.
Not exact matches
The differential - the pie - pan-size round thing you can see easily on the rear axle of cars and trucks - has
gears with more
teeth for smoother
meshing.
There was a very mechanical feel to the shifter, so much so that we could almost feel the
teeth of the
gears meshing together with each shift.