I have a 2000 F-350 4wd, diesel, 6sp., 130000 km. My clutch pedal went right to the floor as I was about to shift from 3rd to 4th. The clutch never disengaged. I can pull it up off the floor but when I push it down it stays on the floor. I can hear the hydraulic fluid moving when I push the pedal down but the clutch stays engaged. It was working perfectly up to the time this happenned.

 

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Go to Ford and get the pre-bled assembly. Something in the price range of $130.00, I think. I've never had to replace one, but I think it just quarter turns in and locks. 15 minute job.

 

Do you see fluid on the outside?
When the slave cylinder goes south the fluid drips out of the bushing.
Master cylinders may drip fluid on the outside or the fluid is just bypassing the o rings internally.

 

I am not sure about the slave cylinder or master cylinder but I have experienced the same thing on my truck and I thought is was the slave cylinder but it turn out to be a spring that broke under the dash that pulls the clutch pedal back out it may not hurt to check that. I know mine would go all the way to the floor and you could take your hand and pull it back out, but still the clutch would stay engaged. hope this might help you.

 

Check the linkage if the bushing is bad the rod to the master cylinder falls off. This makes the the peddle drop to the floor.

 

Hydraulic clutch control assembly. Part # 2C3Z-7C522-CA. List $131.10

 

This is a very good post....saved me a ton of work.

 

the connecting rod will probaly take the longest to do. everything is straight forward.