transmission AUDI A6 1997 C5 / 2.G 01E Transmission Final Drive Ring Gear Adjustment Workshop Manual

39-54

Determining total shim thickness "S
total
" for
shims "S1" + "S2"
(Setting preload of tapered roller bearing for
differential)

Drive pinion removed

- Remove seal and outer races of both tapered
roller bearings for differential.

- Remove shims Page 39
-18
.

Note:
For measurement purposes a shim "S2" of 1.20 mm is initially inserted
which is designated "S2*" in the following. After determining backlash,
"S2*" will be replaced by the correct shim "S2." - Drive outer race for tapered roller bearing with shim "S2" into
transmission housing. For measurement purposes an "S2*" shim 1.20
mm thick (2 shims of 0.60 mm) is used.
Pa
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39-55


- Press outer race for tapered roller bearing without shim "S1" into cover
for differential.
- Insert differential without drive wheel for speedometer sender -G22 into
transmission housing. Ring gear is positioned on left-hand side (same
side as cover for final drive).
- Install cover for differential with 4 bolts (25 Nm).
- Position transmission so that cover for differential faces up.
- Turn differential 5 turns in both directions so that tapered roller
bearings settle.

Note:
The tip of the dial gauge must be positioned on center of differential. - Assemble measuring equipment, use a 30 mm dial gauge extension.
- Set dial gauge (3 mm measuring range) -A- to "0" with 2 mm preload.
- Lift differential, without turning, and read off play on dial gauge.
Measurement in following example: 0.62 mm.
Pa
ge 4 of 15 Rin
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justin
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39-56

Note:

Secure special tools VW 521/4 and VW 521/8 on right of differential
(transmission side) to lift differential. If the measurement has to be repeated, the differential must again be
turned 5 turns in each direction to settle the tapered roller bearing.
Formula:
"Stotal
"
=
"S2*" + measurement + bearing preload
Example:

Inserted shim(s) "S2*" 1.20 mm
+ Measured value 0.62 mm
+ Bearing preload (constant) 0.25 mm
=
Total shim thickness "S
total
"
for "S1" + "S2"
2.07 mm
Pa
ge 5 of 15 Rin
g gear, ad
justin
g
11/19/2002 htt
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39-59

Measuring backlash
(Position of ring gear in transmission housing)

Drive pinion with shims "S3" and "S4"
installed

- Install differential.

- Turn differential 5 turns in each direction to
settle tapered roller bearings.

- Secure dial gauge retainer VW 387 onto housing.
- Insert adjustment device VW 521/4 and VW 521/8 for ring gear.
- Fit dial gauge with dial gauge extension VW 382/10 (6 mm flat).
- Set measuring lever VW 388 to dimension a = 79 mm.
- Determine play between the teeth flanks as follows:
- Turn ring gear until it makes contact with a tooth flank (end of
backlash travel).
- Set dial gauge to "0" with 2 mm preload.
- Turn ring gear back until lying against an opposite tooth flank
(backlash).
Pa
ge 9 of 15 Rin
g gear, ad
justin
g
11/19/2002 htt
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yp
e=re
pair&id=AUDI.B5.TM03.39.8