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.
Check drive gear to drive pinion backlash using a dial gauge at several points.
Drive gear to drive pinion backlash:
0.13 - 0.18 mm(0.0051 - 0.0071 in)
Fig 1: Checking Drive Gear To Drive Pinion Backlash Using A Dial Gauge