If it's a manual gear box it has no vacum or pressure inputs.
Try the easy bits first
It could be the selector cables that are under the airbox, it may also be that you need to bleed the clutch, this must be done correctly
From what I can tell, it is the original clutch, and so it's got around 105,000 miles on it!
I wouldn't be surprised if the rest of the parts are also original, so I was planning on changing the clutch slave cylinder and greasing the gear linkage in the first instance, and just hope that any internal parts have still got some life left in them!
This may sound a very stupid question, but looking at the video you posted(very helpful by the way)... do the brake system and clutch system share a fluid reservoir? I can't find any reference to a separate clutch reservoir...
The Brake and clutch fluid are in the same reservoir :-)
If you for some reason decide to flush the brakes as well, do not let the reservoir run down to much or you could get air in to the abs pump. Then you will need a computer with dis on it to activate the abs pump to remove the air.
Just for bleeding the clutch you will not have a problem as long as the piston is pushed back.
If you push the piston back and jam it with out removing the slave cylinder. If the peddle is hard or goes hard when you are bleeding it do not push on it or you could snap the gear box mounting lugs. Open up the bleed nipple more.
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