As I drove the truck around my neighborhood, I could not get the clutch to work. I had a firm pedal, but the clutch would not engage. I already replaced the master cylinder a couple of months ago. I really did not want to pull the motor out again. the clutch slave cylinder was easily accessible, so I decided to replace it.
When I removed the old cylinder, I immediately knew what was wrong. The rod that transfers the motion of the slave cylinder piston to the clutch fork was missing. I then expected Jeff Foxworthy to give me a sign. I put the new cylinder on the transmission, and the push rod too. It works fine now.
I still haven't found the original push rod... nor my sign.