I've noticed that my Zhp occasionally makes a rattle sound coming from the transmission when I'm just idling the car in neutral with the clutch pedal up. As soon as I depress the clutch pedal the noise goes away. Other times you won't hear anything even if my foot is not on the clutch. I've had it rattle like in the video posted below and as soon as I drive the car about 10 feet and plop it back in neutral the noise will be gone. Car seems to shift fine throughout the gears except for the occasional notch into first which I would attribute to the original 85k mile fluid. Also, the sound Does follow the engine speed if you listed closely in the video, if that means anything. Does anyone else have this issue or know what it might be?
https://youtu.be/-VseZmjNYkg