Outer Limits 4x4 Board

Hey guys,
when my clutch is engaged there is a constant squeel, when i depress the clutch it goes away everything seems to be working properly but i am worried that something will flog out. I think its the thrust bearing does it spin when the clutch is engaged or only when disengaging?

Possibly the spigot bearing/bush in the end of the crankshaft. When the clutch pedal is out (engaged) it spins at the same speed as the crank so isn't in action, but when the clutch pedal is in (disengeged) the crankshaft is spinning but the input shaft is stationary. The spigot is then rotating compared to the gbox input. my 2c..

It's a gbox out job to fix... happy spannering..