Adjusting gear set, recommended sequence

WARNING: This page is about a different car, the 2008 Audi A4, 2007 Audi A4, 2006 Audi A4, and 2005 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Adjusting Gear Set

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The following work sequence is recommended to save time when crown wheel and pinion shaft have to be adjusted:

Determine total shim thickness "S_total " (S₃ plus S₄ ) for the specified preload on pinion shaft tapered roller bearings.
Distribute total shim thickness "S_total " (S₃ plus S₄ ) so that dimension from center of crown wheel to end face of pinion shaft corresponds to installation dimension "R" determined during production.
Determine total shim thickness "S_total " (S₁ plus S₂ ) for the specified preload on differential tapered roller bearings.
Distribute total shim thickness "S_total " (S₁ plus S₂ ) so that the specified backlash between crown wheel and pinion shaft is obtained.