For a long time Iíve had a weird rattle in the drivetrain on decel. I suspected pilot bearing, more specifically, the aluminum flywheel where the pilot bearing fits into. It was a little free fitting when I assembled it. I should have known better but I ignored it.
So anyway, this weekend I replaced the fidanza flywheel with an ACT streetlight. New pilot bearing and new OEM throw out bearing.
Did you use the specified lock-tite for the pilot bearing when assembling it. They are built to loose specs due to dissimilar metals expanding at different rates.
There's a discussion about it in my journal starting at post #99