Arb RD103 User Manual download pdf (Page 11)

2 Removing the Existing Differential

2.5 Checking the Current Backlash Amount

IMPORTANT:

This step is a precautionary measure recommended by ARB due

to the fact that some after market ring and pinion sets have been

manufactured to run with different backlash settings than those

specified by your vehicle manufacturer. Although ARB must

recommend you set backlash according to your service manual

guidelines, we also advise that you compare the backlash

measurements taken here to the recommended backlash settings

in your vehicle service manual. Measurements found to be

outside of your service manual recommendations may indicate

the need to deviate from those settings in order to achieve quiet

running with a good contact mark.

Refer to your vehicle service manual or your local authorized

ARB installer for more information.

c Set a depth indicator on one of the ring gear teeth as in figure 4.

Figure 4.

c 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.

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

c Record the average of all measurements.

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Arb RD103 User Manual Page 11