Quote: I worked on a buddies 383 last year that had a dead cylinder from a burnt valve, it idled rougher than it should have but it didn't shake violently.
Is it worse in gear, even if you bring the revs up to the same as idle in park? Sounds like a busted motor or tranny mount to me.
It's no better or worse whether it's sitting in Park in the garage or in Drive at a red light. I'm not sure if my center console is bolted down completely, but once it starts going, you can hear and see it rattle and vibrate. It also doesn't seem to happen all the time while driving (either that or I'm not noticing it).
