A6 Quattro Sedan V6-2.7L Turbo (APB) (2000)
by the manufacturer.
Determining total shim thickness "Stotal" for shims "S1" + "S2"
(Setting preload of taper roller bearing for differential)
Drive pinion removed or ring gear dismantled from differential housing
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Pull out drive flange oil seal with lever.
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Remove differential taper roller bearing outer races and take out shims.
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Press outer race of left-hand taper roller bearing for differential (housing side) with shim "S2" into housing. To perform the measurement use a
shim "S2*" with a thickness of 1.00 mm (one 0.80 mm shim and one 0.20 mm shim).
Note: For measurement purposes a shim "S2" of 1.0 mm is initially inserted which will be designated "S2*" in the following. After determining
the backlash "S2*" will be replaced by the correct "S2."
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Knock in outer race of right-hand taper roller bearing for differential (final drive cover side) without shims (install as far as the stop).
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Insert differential into housing. The ring gear is positioned on the right side (cover side).
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Fit cover and tighten bolts to 25 Nm.
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Install special tools VW 521/4 and 521/8 onto housing side in differential housing.
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Turn cover side of differential housing upward.
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Turn differential 5 turns in both directions to settle the taper roller bearing.
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Place measuring plate VW 385/17 onto differential.
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Fit measuring tools.
A- Dial gauge extension approx. 30 mm long
B- Hexagon bolt M8 x 45
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Place dial gauge extension on the center of the measuring plate VW 385/17.
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Set dial gauge (3 mm measuring range) to "0" with 2 mm preload.