ARB RD142 - Manual (Page 12)

3 Installing the Air Locker
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Figure 4.
3.2 Installing the Carrier Bearings
NOTE : If you are installing an Air Locker into an earlier model
Toyota with a 45mm differential carrier bearing inside
diameter then you will need to use the higher rated
later model 50mm bearings:
Timken # 32010X-32010X
ARB # 160116
If your OE carrier bearings have an ID of 50mm,
replace them with new bearings of the same type.
Apply a thin film of high pressure grease to the bearing journals of
the Air Locker, then press the bearing cones onto the bearing
journals as shown in Figure 5.