Before adjusting linkages, I would inspect your bushings. A missing or damaged bushing might cause this, and they are rather easy to replace. You will have to pull the battery and tray to get to the area of the bushings.
If you adjust things first, it will be harder to get everything smooth and adjusted right after finding a worn or broken bushing.
You will need a helper to operate the shift while you observe.
Addendum: Also, you will need a 5mm pin, as I recall, for which I used a 5mm drill, to align the shifter, inside the car. I am adding this because some people neglect this step.