Clutch trouble

[csgammon]

here is what i have the clutch worked fine one nite and the next morning i have no pressure on the pedal it goes straight to the floor is will work sometimes but also it wont work and the truck stays in gear and pulling with it pressed to the floor when it does work it takes off with the slightest movement upward it acts like brakes when there is air in the line nedd help bad

 

[Cobraguy]

sounds like you have a hydraulic failure that either dropped all the fluid, or is just internally bypassing the master cylinder or slave cylinder pistons.