Isuzu mu slave cylinder leaking.

[u13turbo]

Hey guys

On my river truck i needed a new gearbox so the slave cylinder had been off, went to connect back up today and its leaking clutch fluid around the bolt or valve that connects to the slave cylinder.

Just wondering if this is an easy fix? or i need a new slave cylinder?

I tried putting thread tape around the bolt and top of the valve so it wouldnt leak, but then the fluid wouldnt even go through the lines.