Is it possible for my clutch master cylinder or slave cylinder to be bad and not leak fluid? The clutch master cylinder was replaced a couple of years ago, slave cylinder probably about 30k on it. My clutch feels soft and sometimes goes right to the floor with little resistance but will pump back up. I have tried bleeding it and there is no air in the line. Everthing I have read indicates when these parts fail they leak. Any help would be appreciated.

Thanks
Jamie
87 Vanagon GL
73 Westy