Disassembly (M/T Models)

WARNING: This page is about a different car, the 2005 Nissan Frontier. However, it is still accessible from the selected car via links, so may be relevant.

Remove the retaining ring from the 2-4 shift fork, using suitable tool.
Remove the fork guide collar and 2-4 shift fork spring from the 2-4 shift fork.

Fig 1: Removing The Retaining Ring From The 2-4 Shift Fork
Courtesy of NISSAN MOTOR CO., U.S.A.