Page 15 of 34
39-52
Checking measurement
Checking dimension "r"
- Install pinion shaft/hollow shaft with measured
shims S3 and S4.
- Turn hollow shaft against pinion shaft 5 turns in
both directions, so tapered roller bearing can
settle.
Note:
After removing universal mandrel, and with VW385/30 master gauge in
place, check dial indicator again to see if it indicates "0" with 2 mm
preload, otherwise correct adjustments. - Insert universal mandrel determining measurement "e", Page 39
-
47
and perform check measurement.
- Read off dial indicator counterclockwise (red scale).
If the shims have been correctly selected, deviation "r" (marked on
outer circumference of ring gear) must be displayed - within a tolerance
of 0.04 mm
Pa
ge 15 of 34 Total shim thickness Stotal for shim S3 + S4, determinin
g
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.TM02.39.7
Page 24 of 34
39-60
- Lift differential without turning, and read off play
on dial indicator.
Measurement in following example: 0.62 mm
Notes:
To lift the differential, attach VW521/4 locking sleeve and VW521/12
on the right of the differential (housing side). If the measurement has to be repeated, the pinion shaft with hollow
shaft must be turned 5 turns in each direction first 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 value) 0.30 mm
= Total thickness Stotal for S1 + S2 2.12 mm
Pa
ge 24 of 34 Total shim thickness Stotal for shim S3 + S4, determinin
g
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.TM02.39.7
Page 28 of 34
39-63
Measuring backlash
Position of ring gear in transmission housing
Pinion shaft with shims S3* and S4* installed
- Install differential.
- Turn differential 5 turns in each direction to
settle tapered roller bearings.
- Secure VW387 dial indicator holder onto housing.
- Attach VW521/4 locking sleeve and VW521/12.
- Install dial indicator and VW382/10 extension pin (6 mm flat).
- Adjust VW388 measuring lever to dimension -a-:
Distance -a-: 67 mm (2.637 in.) for 170 mm (6.693 in.) diameter ring
gear.
- Determine play between teeth flanks as follows:
- Turn ring gear until it makes contact with tooth flank (end of backlash
travel).
- Set dial indicator to "0" with 2 mm preload.
- Turn ring gear back against opposite tooth flank (backlash).
Pa
ge 28 of 34 Total shim thickness Stotal for shim S3 + S4, determinin
g
11/20/2002 htt
p://127.0.0.1:8080/audi/servlet/Dis
play?action=Goto&t
yp
e=re
pair&id=AUDI.B5.TM02.39.7
