when something goes wrong after recent work, pretty safe bet something about that work was substandard, quite possibly parts .... could even be something about the clutch/throw out bearing, front trans bearing retainer ... did you renew the clutch on re-assembly?
if you had the flywheel resurfaced the bushing would have been removed .... OTOH, if it wasn't and you you didn't replace it, the old one should still be in place, and likely well worn, which may have contributed to failure of a poor quality replacement input bearing
Bill
