Do these pics give any insight into the type of flywheel?
Also, what sound is most concerning, the one where I'm rocking the wheel by hand or the when I lightly apply brakes? I'm not sure if the one where I'm doing it by hand is a normal sound all cars would make due to gear backlash or whether it is indicative of something being wrong.
I replaced gearbox oil a couple of months ago.
Funnily enough, at higher rpm even under max throttle and high boost I don't get the rattle, seems really only to occur under load at low engine speeds.