Arb RD85 User Manual download pdf (Page 24)

4 Installing the Air Locker

4.9 Final Backlash Checking

c Set a depth indicator on one of the ring gear teeth as in

Figure 12.

c While supporting the pinion gear by holding the drive shaft, 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.

c Rotate the differential center 90° and measure again for accuracy.

Figure 12.

c Refer to your vehicle service manual for the specified maximum

and minimum amounts of backlash. If the backlash is not within the

specifications then the differential will have to be removed and re-

shimmed.

4.9.1 Re-Shimming the Backlash

NOTE : This step is only necessary when adjusting for

incorrect backlash.

c Reapply the spreader to the differential housing.

c Remove the bearing caps.

c Remove the differential.

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Arb RD85 User Manual Page 24