The clutch will not disengage on my 786. When the clutch pedal is pushed in you can hear the gears slow down but not enough to put it in gear. When in gear the clutch holds ok. Is the TA out or is there an adjustment out of wack. I used the tractor earlier today and it was fine. I got back on it later and put it in reverse and backed up and it would not disengage. When going forward if you push the clutch in with the tractor going down a hill it will free wheel until it gets slowed down.