well, for him it does sound like the tranny cuz it only does it into 1 gear, mine it ois into every gear so it seems like either it HAS to be the clutch or it is like the 1 in 9,999,999,999,999 chance that all syncros go out all at once. I at first thought maybe my slave cylinder was bad and leaked or somwthing so that when you shifted quick and pushed in the clutch really fast the slave cylinder would leak and let soem air in or somehting and it would not disengage completely but I bled the line completely and the slave cylinder never loses fluid so it cant be that. I am getting the clutch replaced and hopefully it will be fixed.