Clutch Drag

[Ncoates]

I am having problems with the clutch dragging on my car. 1930 3 speed box. Fine engaging 1st gear when cold, but it is impossible to engage without mashing the gears, when the gearbox has warmed up. Idle is not excessively fast and using an EP 80/90 gear oil. I note in previous threads that various people have suggested that the incorrect length splined spigot on the driven plate may be the culprit, resulting in it bottoming out in the gearbox input/constant mesh gear shaft. I wondered what the different lengths of spigot are, so I can check mine and perhaps take a fraction off the end with a grinder, or find another one. Surely though, the difference in lengths can't be that borderline.... Alternatively, I wondered whether a worn driven plate spigot could be allowing the driven plate to flop down slightly and rub against the pressure plate at the bottom. I think it would have to be completely knackered to do so, which mine is not. I also note that the clutch pedal sometimes slowly comes up, when you take your foot off it, and I wondered whether this could indicate a worn thrust bearing register on the gearbox.

Any thoughts? 

Nick