Outer Limits 4x4 Board

i just had a new clutch put in and now the clutch pedal vibrates audibly while the car is driving in gear or with the clutch pedal up in neutral. If i put my foot on the pedal and take up the slack there isnt any vibration felt. the only thing i could think of is that the clutch cable has too much slack in it and is causing the vibrations.??

i guess make sure the gearbox dowels were put back in.
or maybe the throw out bearing wasnt put back in proper