Gear, Washer, Shaft and Case
WARNING: This page is about a different car, the 2004 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
Check side gears, side gear thrust washers, pinion mate shaft, pinion mate gears, pinion mate thrust washers and differential case as shown. If necessary, replace with new parts.
Courtesy of NISSAN MOTOR CO., U.S.A.