ARB RD158 - Manual (Page 13)

3 Bench Measurement
11
3.2 Calculation & Selection of Shims
The thickness of the shim pack 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:
§ remove shims from the shim pack you measured as ‘B’.
§ add some shims from the shim pack you removed from the right
hand side of the original differential to the shim pack you
measured as ‘B’.
§ 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 or worn.