I would have someone else sit in the driver's seat while the engine is
running and tranny being engaged (forward only!), then look underneath
at the tranny to see if either output flange of axle is turning. Still
sounds like a CV joint could be a possibility. After this check, THEN
you can say tranny for sure (or not).

Karl

David Kao wrote:
> Yes, it makes bad clunking noise even in neutral as soon as I start to
> release the pedal. It's only as good as a core now.