A8 Quattro Sedan V8-4.2L (AUX) (2001)
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Remove tunnel supports (arrows).
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If not present, mark position of drive shaft relative to rear final drive with paint.
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Loosen mounting bolts on both drive shaft flanges and mark base plates.
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Prepare alignment fixture 3139 with adaptor 3139/2, as shown.
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Use alignment fixture 3139 with adaptor 3139/2, as shown, and tighten plastic nuts.