I had my stock 08 GT500 to the dealer a few days ago to install a new windshield (hit by a rock) and have its first oil change (2500 miles, 1 year old). Now it has a new noise. When in neutral with the clutch out the shifter has a slight rattle, pushing the shifter to the left or right will stop the noise, putting into gear or depressing the clutch also makes it go away. I have never heard this before. My first thought was "what did they do to my car?" But I remember reading post here about "gear roll over noise". Does it sound like that is what I am hearing or is it something else?