I have a 1975 midget it has been running and shifting fine tried to take it out today but it will not shift while running if you shut it off it goes into gear is this the master cylinder slave cylinder or the clutch also level on fluid top off no sign of a leak thanks bruce
Sounds like the master cylinder is leaking internally. The fluid is blowing by the seals when you depress the clutch pedal instead of pushing the fluid and operating the slave cylinder.