broken clutch, guess what broke

[68 TT]

The clutch in my 78 K20 quit working yesterday on the way home from work.

It started a week ago with the clutch pedal not returning back to the top all the way unless you popped it up with the toe of your foot. Still worked just fine. I just thought the bell crank linkage was sticking and needed grease so I put it off since the weather sucked and I don't have a garage to work in.

Yesterday morning I noticed that the clutch was engaging and moving the truck with only about 1/2" of pedal movement off the floor. As I headed home it got worse and worse until it was nearly impossible to shift into another gear and it started creeping forward with the clutch pushed in all the way.

By the time I got home I could not get it into gear with the engine running.

Crawled under the truck and took a look. Everything looked normal and all the parts were in the right place. Nothing obviously broken.

The only problem was that I could move the bell crank half way through its motion toward the clutch fork (moving the fork too) by hand before I felt it increase resistance to what the pressure plate should be giving. I set the adjustment rod all the way to the end of the threads and still could not get enough clutch function to shift into gear with it running.

I will start tearing into it tonight and try to figure out what broke.

Any guesses what failed?

I'm thinking the clutch fork cracked at the pivot ball in the bell housing.

Pictures to follow after disassembly begins.