Center Differential Housing, Installed Transmission And Bolted Driveshaft: Installing

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Install in reverse order of removal. Note the following:

Tightening specifications, refer to Specifications

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).

-- Make sure the spacer sleeve -2- and the shim -1- are mounted on the output shaft.

Fig 2: Ensuring Spacer Sleeve And Shim Are Mounted On Output Shaft

Courtesy of AUDI OF AMERICA, LLC

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

Fig 3: Coating Both Surfaces On Gear Carrier Slightly With Transmission Fluid

Courtesy of AUDI OF AMERICA, LLC

-- Insert the gear carrier.

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 4: Installing Plate Spring -5-, Adjusting Shim(S) -4- And Pressure Spring -3- In Center Differential Housing -6-

Courtesy of AUDI OF AMERICA, LLC

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

-- Attach the plate spring -5- and shim(s) -4- in the center differential housing -6- with a little grease.

Plate spring installation location: The side rounded on the outside faces the rear flange shaft.

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

Fig 5: Tightening Sequence, Center Differential Housing - Bolted Driveshaft

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolts for the center differential housing. Refer to Specifications .

-- Install the tunnel crossmember and tighten it. Refer to TUNNEL CROSSMEMBER, TRANSMISSION MOUNT AND TRANSMISSION SUPPORT OVERVIEW .

Fig 6: Identifying Bolts & Tunnel Crossmember

Courtesy of AUDI OF AMERICA, LLC

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 repair information.

-- Attach the driveshaft to the transmission. Refer to the appropriate service information .

-- MANUAL TRANSMISSION FLUID, FILLING .

-- Install the exhaust system free of tension. Refer to [For engine(s) CCBA] Exhaust System, Emission Controls .

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

-- Install the diagonal braces. Refer to REMOVAL AND INSTALLATION .

-- Install the noise insulation. Refer to "Underbody Trim" in NOISE INSULATION .