No, not related.
Clutch system has master(with reservoir) and slave cylinder, hose in between.
Then a pedal and push rod(with switch)
Engine--Flywheel-()-pressure plate--throwout bearing--slave
Pilot bearing--(clutch disc)--input shaft----------Transmission
Transfer case is not involve in any way.
However whatever caused the transfer case to crack obviously stressed the trans bell housing as well, did you check it for cracks?
Input shaft misalignment could cause clutch disc to be at an angle to flywheel so there wouldn't be full disengagement