A4 Sedan L4-1.8L Turbo (AEB) (1997)
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Assemble measuring equipment, use 30mm dial indicator extension.
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Set dial indicator (3 mm measuring range) to O with 1 mm preload.
Note: Make sure dial indicator extension contacts machined surface on face of drive shaft..
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Turn transmission 180° so transmission cover faces upward.
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Turn pinion shaft 5 rotations in each direction to seat the tapered roller bearing.
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Read play on dial indicator and note.
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Dimension in the following example: 0.45 mm
Note: If the measurement has to be repeated, first turn pinion shaft 5 rotations in both directions to seat the tapered roller bearing. Set dial
indicator to O with 2mm preload.
Formula:
"Stotal" = "S4*" + measured value + bearing preload
Example:
Installed shim "S4*"
1.00 mm
+
Dimension (example)
0.45 mm
+
Bearing preload (constant)
0.15 mm
__________
=
Total thickness "S total" for "S3 + S4"
1.60 mm
Determining thickness of shim "S3*"
Formula:
"S3" = "Stotal"-"S4*"
Example:
Total thickness "Stotal" for "S3 + S4"
1.60 mm
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Installed shim "S4*"
1.00 mm
__________
=
Thickness of shim "S3*"
0.60 mm
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Remove tapered roller bearing outer race, install shim "S3*" into transmission housing and re-install outer race, Refer to Fig. 3.
.
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Install fully assembled pinion shaft into transmission housing.
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Install transmission cover and tighten to 22 Nm (16 ft. lbs.).