A4 Sedan V6-2.8L (AFC) (1996)
Fluid - Transfer Case: Testing and Inspection
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Separate right catalyst from rear exhaust system and move it toward right side, refer to Exhaust System.
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Remove filler plug -arrow B-.
The fluid level must be up to lower edge of filler opening.
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If necessary top up with suitable synthetic 75W90 API GL5 gear oil.
NOTE: Always replace filler plug.
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Tighten the 18 mm filler plug in differential to: 35 Nm (26 ft lb)