55 chevy 3100 trk, 4 speed on floor left truck in neutral in garage went out and started and tried to put in gear all it did was grind, shut off truck and put it in reverse and put in clutch and cranked it moved as I turned it over ? I then tried a forward gear and cranked with clutch in and it moved forward? So I assume that the clutch is engaged, how can I get it disengaged? throwout bearing seems ok as I run the clutch in and out all seems good but it sure as hell is not? Help please! Daddy D