A8 Quattro Sedan V8-4.2L (BVJ) (2008)
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Before removing the driveshaft - 1 - from the rear final drive, support it with a wood block on the crossmember - 2 -.
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Mark the position of the driveshaft to the rear final drive with paint.
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Install the M10 x 100 (strength category 10.9) bolt - 3 - in the rear final drive.