A4 Sedan V6-3.2L (BKH) (2007)
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Install dial gauge with dial gauge extension ( VW 382/10) (6 mm flat).
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Adjust measuring lever (VW 388) to distance "a" = 79 mm (for diameter 188 mm crown wheel).
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Measure play between teeth faces (backlash) as follows:
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Turn crown wheel until it makes contact with the face of one tooth (end of backlash travel).
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Preload dial gauge to 2 mm and set to "0".
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Turn back crown wheel until it makes contact with opposite tooth face (backlash).
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Take backlash reading and note down measured value.
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Turn crown wheel through 90° and repeat measurements a further 3 times.
Determining average backlash
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Add the four measured values together and divide by four.
‹› Result: the average backlash is 1.16 mm : 4 = 0.29 mm
‹› If the individual measurements differ from each other by more than 0.06 mm, the installation of the crown wheel or the final drive gear set itself is
not correct. Check installation; replace final drive gear set if necessary.
Determining thickness of shim "S2"
Formula: "S2" = "S2* " - measured backlash + specified backlash