Rattling Noise From Transmission!!

Help! I recently replaced the clutch, flywheel, pressure plate, throw-out bearing, pilot bearing and shifter with an F1 stage 1 clutch and ltw flywheel kit on my 98 m3 coupe and now I have a rattling noise coming from the transmission when the clutch pedal is not depressed, happens at idle and throughout all gears noise is kind of whiny at high rpm but not prevalent when pedal is being pushed. I thought it could be harshness from not having a dualmass flywheel but since it goes away when the clutch is disengaged it must be something else right?? Any help would be greatly appreciated!! Thank you!!

Probably the flywheel.

I agree I've had no drivability problems I just had no idea how noisy and grumbly it would sound, thanks!