Do what Glider and WindSpirit07 suggested above. Check the tranny fluid and the primary fluid. Then check the tranny vent on the left side. Should be a hose on an elbow. If this is clogged, and the tranny was overfilled, tranny fluid would be forced up the clutch cable to the adjuster. It would not take much fluid to get up that far since the clearance in the cable shield is small.
TQ