can be 4 different causes for it mate not just the roll pin.
roll pil as stated above 30p from citroen /peugeot part no:- C250924
worn or bent linkages.
2 of
http://www.106parts.co.uk/s2/page1.p...4=55&part=7658 and 1 of
http://www.<br />
<br />
106parts....4=55&part=7657
worn nylon selector ball:-
http://www.106parts.co.uk/s2/page1.p...4=55&part=8757
worn out nylon pivot bushes (on the bottom of the stick) 2 x part no:- 245052
If you replace the whole lot your stick will be rock solid with no slop at all.