This happened on Saturday, and I discovered that the Clutch master cylinder was empty, so I filled it and tried to pump the clutch. It drive me around the block. I tried It again this morning for work and it started to struggle and I had difficulty putting it into gear.

Need to know if the clutch or the Slave cylinder need to be replaced.

Thanks

 

Did you try bleeding it? See if it comes back. Even if it does It lost fluid somehow so you are probably going to have to do a master or slave replace sometime. Is there fluid coming out of bell housing?