See if you can download these files:
http://www.myg37.com/forums/2501490-post14.html
This is the "clacking" noise on startup on a G37, which I also get. It's the same sound. It's not a "ticking" noise either.
What's scary is the repetition and speed of the noise sounds like a rod. So far I've heard it a couple of times at low speed in 1st. Haven't heard it anywhere else, unless it's only the beginning. O_o
I'll try to get a recording whenever I have time.