AUDI A4 1995 B5 / 1.G 01A Transmission Pinion Shaft And Ring Gear Adjustment Workshop Manual

39-146


Pinion shaft and ring gear,
adjusting

Notes:

Careful adjustment of the pinion shaft and ring
gear is important 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 attained 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 related
to the master gauge-adjustable "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) may only be
replaced together as a matched pair.
Observe general repair instructions for tapered
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roller bearings and shims.
Maximum care and cleanliness are essential for
achieving good results during repairs and taking
measurements.
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39-147


Adjustment and marking of gear sets

1 -
Identification "0937" signifies an Oerlikon
gear set with a ratio of 37:9
2 -
Gear set pairing number (312)
3 -
Deviation (tolerance) "r" is based on the
test machine master gauge-adjustable
used during production. Deviation "r" is
always given in 1/100 mm. Example: 25
signifies "r" = 0.25 mm
Ro - Length of master gauge-adjustable
used on test machine "Ro"
Ro - Ring gear = 57.50 mm (2.263 in.)
R - Actual dimension between center axis
of ring gear and face of pinion shaft at
point with quietest running for this gear
set. R = Ro + r
Vo - Hypoid offsetPa
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g gear, ad
justin
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11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
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e=re
pair&id=AUDI.B5.TM02.39.17