My 2013 M6 has a rattle after gear changes. It does not happen all the time and not between any specific gears.The transmission has been replaced with a brand new one, but the rattle remains.
I recorded the sound, please see link below. You can hear it at 3 seconds and 8 seconds and the phone was recording by the gear shifter.
https://xfl.jp/IuvVJ8
Thank you!