That is what's going on with the Stivos and it can cause either crunching, sticking, rattling, vibrations or a combination. Rollamods can you please advise Toyota of your expert advise and coax them to fix it :P
These people have no idea what is going on initially and when we try to tell them its the clutch/flywheel and people that changed the clutch/flywheel fixed it they say they doubt it. But only recently, Toyota acknowledged its a clutch fault but still stubbornly refuses to offer a fix.