i believe only the 540 had lifetime fluid, standard ATF changes for other models is 30-50K depending on driving conditions... mines probably closer to 20K hehe.
HOWEVER.... the fact that there are so many shavings leads me to believe something along the driveline isnt balanced or in line with the tranny, and its pulling the input shaft in a direction other than straight on. double check the driveshaft and differential mounting hardware, as well as the engine mounts.
Alusil, Dinan DME | ITG Air Filter | Eibach/Bilstein HD | 26/20 Swaybars | Iridium plugs | Depo/ProLumen HID | Optima batt. | no AC | Stoptech brake lines, Frozen rotors, brass bushings, Superblue