WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
Using a flat-bladed screwdriver, remove snap ring from front sun gear.
Fig 1: Removing Snap Ring From Front Sun Gear
Courtesy of NISSAN MOTOR CO., U.S.A.
Remove 3rd one-way clutch from front sun gear.
Fig 2: Removing 3rd One-Way Clutch From Front Sun Gear