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It does seem like there is something to this rattling cab reputation.  I see the topic has been discussed on this forum before.  It would be interesting if someone could post some engineering illustrations of how an isolated cab is made and mounted.  If I understand it correctly, the isolated cab is supposed to be quieter and easier riding.  You would think that EMD knows everything about cab design and construction.   So I wonder if the quest for a more comfortable cab has led to over engineering the cab in a way that has made it difficult to manufacture.   <o:p></o:p> I also wonder if putting a cab on cushions or springs might allow that cab to resonate easier to the harmonics of the prime mover.  If so, you would end up with more engine vibration in the cab instead of less.  At the same time, though, the springs or cushions would dampen out shocks and vibrations coming through the locomotive from the track.  If there is a problem, I am sure EMD will fix it, and it will eventually be clearly explained for the historical record as to what went wrong.
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