I recently purchase a 2013 Lancer SE AWC
Under light acceleration when the transmission "shifts" back down from 2200 rpms down to 1100 rpms I get an odd vibration and noise/rattle.

You can here the noise at 1:08, 1:27, and a few more times in this recording:
https://soundcloud.com/user793354841/1a-1

Anyone out there familiar with this sound or have any ideas what might be causing it?

Thank you!