service AUDI A4 1998 B5 / 1.G 01A Transmission Final Drive Ring Gear Pinion Shaft Workshop Manual

39-34


Front final drive ring gear and
pinion shaft, adjusting

Notes:

Careful adjustment of the pinion shaft and ring
gear is essential for the service life and smooth
running of the final drive. For this reason, the
pinion shaft and ring gear 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 ring gear out of the zero-play mesh position
by the amount necessary to maintain the
backlash within the specified tolerance.
The objective of the adjustment is to reproduce
the setting for quietest possible running, as
obtained on the test machine during production.
The deviation, or tolerance "r", which is based
on the master gauge "Ro", is measured for the
final drive sets supplied as replacement parts
and marked on the outer circumference of the
ring gear. The final drive set (pinion shaft and
ring gear) must only be replaced together as a
matched pair.
Observe the general repair instructions for
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