where should my vibe idle when in gear? right now its at about 8000 rpm's and I am experiencing a little vibration, but when I push it into neutral it goes up to 10000 rpm's and is fine with just a small vibrations.

Hi, I am new here and have a few questions. Just bought an automatic 05 Vibe base with 30k miles on it about 2 months ago. Car was fine until about 2 weeks ago when it started to vribrate a little when in gear and idle, lets say stopped at a stop light. The vibration was very minor at first but now ...