ARB RD197 - Manual (Page 11)

2 Removing the Existing Differential
9
2.5.1 A Backlash Measurement of IFS Clamshell
NOTE : Because access to the ring gear is difficult in the
clamshell housing, the following alternative method
for measuring backlash has been provided.
 Firmly clamp the differential housing in a vice or to a workbench.
 Set up a depth indicator with a magnet base on the vice or bench
and position the indicator tip on the machined flat of the pinion yoke
as shown in figure 4.
 Remove the breather to allow a hammer handle or other suitable
device to be jammed against the ring gear teeth to prevent the
differential center from rotating. (Fig.4.)
Figure 4.