VW Gol 2000 gear lever.

Greetings and thanks for allowing me to consult. The gearshift lever has been lazy to neutral. Before he returned to the vertical but not anymore, which leads to the fact that you have to make the changes, which work perfectly.
He has changed the gummies of "alike" as Brazilians say, but it has not been possible to make it firm and return to the vertical position. I have not found where the problem may be, so I appreciate all kinds of help. Thank you and the order.