Complete the Crown Wheel Adjusting Tool -VW 521- as follows:

Fig 1: Crown Wheel Adjusting Tool VW521

Courtesy of AUDI OF AMERICA, LLC

• Place the Positioning Tolerance Shell: VW 521/13  with the smaller outer diameter -arrow- on the Ring Gear Locking Sleeve: VW 521/4  .

-- Insert the Crown Wheel Adjusting Tool: VW 521  and turn the differential five turns each in both directions, so that the bearings set.

Fig 2: Inserting Adjusting Tool VW521/4 And VW521/13 Into Differential

Courtesy of AUDI OF AMERICA, LLC

-- Remove the Crown Wheel Adjusting Tool: VW 521  and install the measuring tools on the transmission housing as follows:

Fig 3: Checking Tapered Roller Bearing Pre-Load

Courtesy of AUDI OF AMERICA, LLC

-- Attach the Dial Gauge Holder: VW 387  to the threaded hole in the transmission housing with the bolt -A-.

-- Place the Dial Gauge Extension on the center of the Measuring Set - End Gauge: VW 385/33  .

-- Set the Dial Gauge for example : VAS 6080A  to >>0<< with 1 mm of pretension.

-- Loosen the four bolts -arrows- diagonally one turn.

-- Read the measured value on the dial gauge.

• Specified value: 0.25 to 0.30 mm

-- If the measure value is not obtained or no torsional backlash is felt, then correct the thickness of the shims "S₁ " and "S₂ ".

• Allocate adjustment shims according to the Parts Information.