ARB RD85 - Manual (Page 13)

3 Bench Measurement
11
3.2 Calculation & Selection of Shims
The thickness of the shim(s) required for the Air Locker (shown as ‘D’
in Figure 5.) can now be determined by substituting the measurements
taken into the following equation.
A + B – C = D
HINT : If your calculations are correct then the following
equation will also be true:
A + B – C – D = ZERO
To make a shim pack to match the measurement you calculated as ‘D’
you can:
§ Modify the shim from the original differential.
§ supplement your original shims with shims purchased from your
vehicle manufacturer.
§ Use a universal shim kit available from most drive train
specialists.
NOTE : Never re-use any shims which are damaged.