Left side

WARNING: This page is about a different car, the 2004 Suzuki Aerio, 2003 Suzuki Aerio, and 2002 Suzuki Aerio. However, it is still accessible from the selected car via links, so may be relevant.

Hold differential assembly with soft jawed vise and apply measuring tip of dial gauge to top surface of gear (2).
Using 2 screwdrivers (1), move gear up and down and read movement of dial gauge pointer.