But if you put one of those wooden-bead seat covers on, then you've got one of those fancy vibrating / massaging seats for free! Helps relax you in heavy stop-and-go traffic..The idle problem can be taken care of just by adjusting the idle up a bit ,set at spec they will have more than I like .Adjust at 25-50 rpm makes a big change ,no more mirror shaking .
"Cure" - no; reduce - maybe, if you put it in the right place - which will vary depending on your vehicle. You need to connect the end on your chassis/frame to a point that is vibrating very little at the particular frequency. See: http://www.kettering.edu/~drussell/guitars/electric.html for an example of modal analysis. Of course, this damper may not be effective at other frequencies, and could make things worse.I have read alot about the idle vibration and the motor mounts would a fluid dampener on the motor cure this problem?