You've already removed the lower steering shaft bush from the gearshift control tube. The nylon bush type thing you can see in your pic is the 1st and reverse lower shift lever retainer. There should be another one above the 2nd & 3rd gear lower shift lever. To get the nylon shift lever retainers out you need to remove the lower shift levers and to get the shift levers out you need to remove the gearshift control tube.
Quoting from the LC workshop manual:-
From the lower end of the steering jacket bend up 2nd & 3rd shift lever retainer locking tab sufficient to clear the 2nd & 3rd shift lever retainer tab.
Rotate 2nd & 3rd shift lever retainer to the right of the tab in the steering jacket.
Rotate the lower shift levers clockwise so that the key-way slots in the levers and the slot in the 2nd & 3rd shift lever retainer are all in line.
Carefully remove the gearshift control tube through the top end of the column.
Remove the 2nd & 3rd lower shift lever, spacer, retainer and 1st & reverse lower shift lever and retainer.
Remove gearshift lower control spring.
Edited by S pack, 01 February 2013 - 09:05 PM.