All Wheel Drive Clutch Valve -N445- OR All Wheel Drive Clutch Valve 2 -N446-, REMOVING AND INSTALLING: Removing

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The ignition is off.

-- Place the vehicle on a lift.

-- Lower the back section of the exhaust system just a little and secure it.

-- Remove the wiring harness bracket from the rear final drive. Refer to REMOVING - "If equipped, remove the bolts -arrows- and remove the wiring harness bracket -1- from the rear final drive" (See Figure).

NOTE:

Mark the connectors -1 through 4- for the Oil Pressure/Temperature Sensor -- and for the Clutch Valves --.

Fig 1: Identifying Oil Pressure/Temperature Sensor Connectors

Courtesy of AUDI OF AMERICA, LLC

Disconnect the connectors -1 and 2-.

-- Disconnect the connector -3- from the All Wheel Drive Clutch Valve 2 -N446- and the connector -4- from the All Wheel Drive Clutch Valve -N445-.

-- Place the Drip Tray under the rear final drive.

-- Remove the bolts -1- from each of the Clutch Valves -- using the Hex Socket - 4mm T10370.

Fig 2: Identifying Clutch Valves

Courtesy of AUDI OF AMERICA, LLC

-- Carefully pry out the Clutch Valve -- with a flat blade screwdriver -3-. Be careful of the pressure spring when doing this. The pressure spring could fall out of the opening in the hydraulic control unit -6-.

-A- = All Wheel Drive Clutch Valve 2 -N446- identification color brown

-B- = All Wheel Drive Clutch Valve -N445- identification color black