audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Pinion Shaft and Crown Wheel Adjusting General Information|Page 6766 > < Pinion Shaft and Crown Wheel Adjusting General Information|Page 6764
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‹› If the measurement has to be repeated, the differential must again first be turned 5 turns in each direction to settle the tapered roller bearings. 

Formula: "Stotal" = "S2* " + measured value + bearing preload

Determining thickness of shim "S1* "

‹› Provisional shim "S1*" is replaced with final shim "S1" after determining backlash.

‹› Total shim thickness "Stotal" remains unchanged. 

Formula: "S1*" = "Stotal" - " S2*"

Refer to for required shims.

Measuring backlash

‹› Install pinion shaft with shims "S3" and " S4".

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Install differential with crown wheel: S1 is installed on cover side, S2 in transmission housing.

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Install cover for final drive and tighten bolts to 20 Nm.

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Insert crown wheel adjusting tool (VW 521/4 ) and (VW 521/12).

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Turn differential 5 turns in both directions so that the taper roller bearings seat properly.

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Secure universal dial gauge bracket (VW 387) to housing.

Pinion Shaft and Crown Wheel Adjusting General Information|Page 6766 > < Pinion Shaft and Crown Wheel Adjusting General Information|Page 6764