Hi!

I verified the hydraulic clutch system by a functionnal test, on a level
surface and the disengagement seems correct, there is nothing abnormal like
smell, or a tendency to move foward. Also there is no grinding noise when
the gears engage, and the shifting problem is the same when the motor is
running and when it's stopped. I read that a bad disengagement should render
the shifting harder when the motor is running.
These facts let me think that the problem could come from the shifter
mecanism.

Any idea?
May I acces the mecanism by inside the car?

Thanks.