Im going thru the same deal right now. I had my flywheel resurfaced and trued. Im putting in a new clutch,but when i took it apart i noticed where grease from the T/O bearing had gotten onto the flywheel and made a chattery mess of it.
You have to use high temp grease on the groove of the T/O bearing,so im not taking any chances this time.
Good Luck,
Marty