Center Differential, Removing And Installing, Vehicles With Attached Driveshaft: Installing

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Install in reverse order of removal. Note the following:

Tightening specifications:

Refer to the service information "S tronic Transmission Internal Components". Refer to OVERVIEW - CENTER DIFFERENTIAL HOUSING, ATTACHED DRIVESHAFT .
See Fig 6.

NOTE:

Replace the bolts for the center differential housing.

-- Clean both housing separating surfaces thoroughly. They must be free of oil and grease.

-- Apply a bead sealant -arrow 1- evenly and not too thick on the housing surfaces; sealant.

Fig 1: Applying Sealant Bead On Housing Surface

Courtesy of AUDI OF AMERICA, LLC

-- Place a sealing ring round each bolt hole to prevent contact corrosion -arrow 2-.

-- Coat the gear carrier surfaces with transmission fluid (MTF).

-- Coat both outer ring surfaces on the gear carrier slightly with transmission fluid (MTF).

-- Insert the gear carrier.

Fig 2: Installing Gear Carrier Into Transmission Housing

Courtesy of AUDI OF AMERICA, LLC

Installed position: The tab on the gear carrier -arrow A- must fit into the opening in the transmission housing -arrow B-.

-- Place the center differential -2- on the transmission -1-.

Fig 3: View Of Center Differential -2-, And Transmission -1-

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-- Mount the guide sleeve -4- on the center differential.

-- Install the pressure spring -3- into the center differential.

-- Press the center differential housing centrally on until it makes contact with the transmission housing and hold it securely.

Fig 4: Center Differential Housing Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the center differential housing bolt. Refer to the service information "S tronic Transmission Internal Components)". Refer to OVERVIEW - CENTER DIFFERENTIAL HOUSING, ATTACHED DRIVESHAFT .

-- Install the tunnel crossmember and tighten it. Refer to OVERVIEW - SUBFRAME MOUNT .

Fig 5: Identifying Tunnel Crossmember And Bolts

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NOTE:

Check the vehicle data label or the designation on the rear final drive itself to determine which one is installed in the vehicle. Then select the correct rear final drive service information.

-- Install the driveshaft. Refer to INSTALLING - Driveshaft Connected On Transmission Side, or INSTALLING - Driveshaft, Mounted On Transmission Side (Sport Differential) .

-- Refer to TRANSMISSION FLUID, DRAINING AND FILLING .

-- Reconnect exhaust system making sure it is not under stress. Refer to EXHAUST SYSTEM, INSTALLING WITHOUT TENSION .

-- Install the subframe crossbrace. Refer to SUBFRAME CROSSBRACE, REMOVING AND INSTALLING .

-- Install the noise insulation. Refer to OVERVIEW - NOISE INSULATION .

Fig 6: Identifying Air Guide And Bolts

Courtesy of AUDI OF AMERICA, LLC