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 the runout of the drive gear using a dial gauge as shown.
Runout limit: 0.05 mm (0.0020 in) or less
Fig 1: Checking The Runout Of Drive Gear Using A Dial Gauge