WARNING: This page is about a different car, the 2007 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
Remove snap ring from front sun gear using suitable tool.
Fig 1: Identifying Snap Ring
Remove 3rd one-way clutch from front sun gear.
Fig 2: Identifying 3rd One-Way Clutch In Front Sun Gear