2007 aveo car runs smmoth in park vibrates when in gear at stop sign info needed

[ljds]

car runs smooth in park put it in gear with brake on car vibrates rpm 750 rev to 1000 runs smooth put in new spark plugs 25000kms on the car no diferrence in forward or reverse

[Thymeclock]

There could be several things as possible causes for it. But first, I'd check for bad motor mounts.