A6 Sedan V6-3.2L (BKH) (2007)
Differential Output Shaft: Testing and Inspection
Differential Shaft, Checking For Wear
Differential shaft, checking for wear 01J, Continuously Variable Transmission (CVT)
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Differential removed.
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Shaft seal removed.
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Check differential shaft sealing surface for scratches or damage.
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The differential shaft sealing surface must not be scratched or scored.
Note:
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Even the smallest scratches or damage on the differential shaft sealing surface will cause lack of seal, even with a new shaft seal.