ARB RD197 - Manual (Page 12)

2 Removing the Existing Differential
10
 With the hammer handle preventing the differential from rotating,
rotate the pinion yoke in both directions while observing the
maximum variation in depth from the indicator (i.e., the highest
value minus the lowest value). This value will be comparable to the
ring and pinion backlash and provide an accurate method for
setting up the backlash once the Air Locker is installed.
 Rotate the differential center 90
° and measure again for accuracy.
 Record the average of all measurements.
2.5.2 B Backlash Measurement of Live Axle
 Set a depth indicator on one of the ring gear teeth as in Figure 5.
Figure 5.
 While supporting the pinion gear by holding the drive shaft flange,
rotate the differential in both directions while observing the
maximum variation in depth from the indicator (i.e., the highest
value minus the lowest value). This value is referred to as the ring
and pinion backlash.
 Rotate the differential center 90
° and measure again for accuracy.
 Record the average of all measurements.