A4 Quattro Cabriolet V6-3.2L (BKH) (2007)
Differential: Overhaul
Backlash, Measuring and Adjusting
Backlash, Measuring and Adjusting
‹› Driveshaft installed with shims "S3" and " S4".
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Install differential with ring gear: S1 is on the cover side, S2 installed in transmission housing.
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Install cover for final drive and tighten bolts to 20 Nm.
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Insert Locking Sleeve (VW 521/4) and (VW 521/12).
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Turn differential 5 turns in both directions so that the tapered roller bearings settle.
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Secure Dial Gauge Holder (VW 387) to housing.
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Insert dial gauge with Extension Pin (VW 382/10 ) (6 mm).
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Set Measuring Lever (VW 388) to dimension "a" = 73 mm (for ring gear dia. 182 mm).
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Determine play between the teeth flanks as follows:
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Turn ring gear until it makes contact with a tooth flank (end of backlash travel).
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Set dial gauge to "0" with 2 mm pre-load.
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Turn ring gear back until lying against an opposite tooth flank (backlash).
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Read off backlash and note measured value.
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Turn ring through 90° and repeat measurements a further 3 times.
‹› If drive pinion turns when measuring, counter hold drive pinion so that an exact torsional backlash can be measured.
Determining average backlash