A4 Sedan L4-2.0L Turbo (BPG) (2005)
Pinion Gear: Service and Repair
Pinion shaft and crown wheel, adjusting, 01X, 6 Spd. M/T FWD
Note:
^
Careful adjustment of the crown wheel and pinion shaft is essential to ensure that the final drive gives long service and runs silently. For this
reason, the pinion shaft and crown wheel are matched together during manufacturing, and checked to ensure a good mesh pattern and quiet running
in both directions of rotation. The position of quietest running is found by moving the pinion shaft in an axial direction and at the same time lifting
the crown wheel out of the zero-play mesh position by the amount necessary to maintain the backlash within the specified tolerance.
^
The object of the adjustment is to reproduce the setting for quietest possible running, as obtained on the test machine in production.
^
The deviation (tolerance) r in relation to the master gauge Ro is measured for the final drive sets supplied as replacement parts and marked on the
outer circumference of the crown wheel. The final drive set (pinion shaft and crown wheel) may only be replaced together as a matched pair.
^
Observe the general repair instructions for tapered roller bearings and shims.