do i need to change the slave cylinder??? on 1993 Ford Ranger

i have a 1993 ford explorer and i just have the engine rebuild and i put a new clutch. Last time when i was driving to work my car slow down and the engine turn off what i notice when i check the oil reservoir from the clutch it was completly low.Now it doesnt want to turn on the clutch pedal went smooth and all the way to the floor. Also i try to bleed it out and is leaking from the bell housing and the pedal it wont get firm like it was before.

Asked by for the 1993 Ford Ranger
2 answers
HOW OLD IS THE SLAVE CYL?
Warranty on parts and labor from installer?