Recommended sequence for adjusting gear set

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Fig 1: Recommended Sequence For Adjusting Gear Set

Courtesy of VOLKSWAGEN UNITED STATES, INC.

If drive pinion and gear ring have to be adjusted, the following sequence is recommended for maximum efficiency:

Determine shim " S ₃ " so that the dimension from center of ring gear to facing drive of drive pinion corresponds to the installation dimension determined during production.
Determine shim " S ₄ " for double angular contact ball bearing preload.
Total shim thickness " S _total " Determine (S ₁ plus S ₂ ) for specified preload of tapered roller bearing/differential.
Total shim thickness " S _total " Distribute (S ₁ plus S ₂ ) so that the specified torsional backlash is present between ring gear and drive pinion.