Hi Paul,
I have been reading training manuals for 3 different gearbox robots and they all mention a clutch actuator position sensor, so I'd say the controller needs this information to allow gear shifting. Either on the master cylinder (M20-M40 dualogic) or on the buil-in actuator (C328C). So YES, you have to leave it expand ...
Here is a link for a very nice video, I wish you spoke spannish, but if not the images are almost self explaining:
And another one where the guy shows how to dis/re-assemble the thingy :
And the oast one, still in spannish (have a look at 5') :
Very interesting stuff ...
BRs, Bernie
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