Left Flange Shaft Ball Bearing Pre-Tension, Adjusting Vehicles Through VIN 8K0BA088680 Or 8FXBN009589

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The left flange shaft is removed. Refer to LEFT FLANGE SHAFT, REMOVING AND INSTALLING .
Bearing bracket with wear pattern "B". Refer to LEFT FLANGE SHAFT BALL BEARING PRE-TENSION, CHECKING, VEHICLES THROUGH VIN 8K0BA088680 OR 8FXBN009589 (traces of wear if necessary with material erosion all around the hole). See Figure.

Fig 1: Checking For Traces Of Wear (Wear Pattern "B")
Courtesy of AUDI OF AMERICA, LLC
The bearing bracket and ball bearing must be replaced. Refer to LEFT FLANGE SHAFT BALL BEARING MOUNTING BRACKET, REMOVING AND INSTALLING .

Procedure

Fig 2: Clean Off Any Dirt And Corrosion From Contact Surface

Courtesy of AUDI OF AMERICA, LLC

-- Clean off any dirt and corrosion from the contact surface -arrow- using 150 grain sand paper.

NOTE:

It is not necessary to sand the contact surfaces all the way down to bare metal. It is enough to just remove any dirt and corrosion.

-- Clean the contact surface and bearing seat.

-- Install the new left flange shaft ball bearing -arrow- into the bearing seat.

Fig 3: Installing New Left Flange Shaft Ball Bearing

Courtesy of AUDI OF AMERICA, LLC

Next procedure:

By bearing oversize (the bearing sticks out slightly above the contact surface). Refer to LEFT FLANGE SHAFT BALL BEARING PRE-TENSION, ADJUSTING VEHICLES THROUGH VIN 8K0BA088680 OR 8FXBN009589
With bearing undersize (the bearing sits deeper than the contact surface). Refer to LEFT FLANGE SHAFT BALL BEARING PRE-TENSION, ADJUSTING VEHICLES THROUGH VIN 8K0BA088680 OR 8FXBN009589 .

Procedure if there is bearing oversize

Fig 4: Measuring Bearing Oversize Value

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-- Place Straight Edge - 500mm VAS6075 straight across the bearing and determine the distance to the contact surface on the transmission housing on both sides with the feeler gauge.

-- Write down the measured value.

-- Place the straight edge 90° offset across the bearing and determine the distance to the contact surface on the transmission housing on both sides with the feeler gauge.

-- Write down the measured value.

Selecting the shim(s):

NOTE:

Use the smallest value take from the four values to select the shim(s).

Specified value, bearing oversize = 0.5 to 0.8 mm

	Smallest bearing oversize (example = 0.1 mm)
+	Shim(s) thickness, (= 0.3 mm)
=	Bearing pre-load (specified value = 0.5 to 0.8 mm)

Example:

1 shim: 0.1 mm + 0.3 mm = 0.4 mm, "bearing pre-load is too small"

2 shims: 0.1 mm + 0.3 mm + 0.3 mm = 0.7 mm, "bearing pre-load is in the specified range"

Result: insert two 0.3 mm shims to reach the bearing pre-load = 0.7 mm within the 0.5 to 0.8 mm specified value.

Procedure if there is bearing undersize

Fig 5: Measuring Bearing Undersize Value

Courtesy of AUDI OF AMERICA, LLC

NOTE:

The bearing undersize can only be determined in the described procedure.

-- Place Straight Edge - 500mm VAS6075 straight across the contact surface on the transmission housing and measure the distance to the bearing on both sides with a feeler gauge.

-- Write down the measured value.

-- Place straight edge 90° offset across the contact surface on the transmission housing and measure the distance to the bearing on both sides with a feeler gauge.

-- Write down the measured value.

Selecting the shim(s):

NOTE:

Use the largest value take from the four values to select the shim(s).

Enter the measured bearing undersize as negative value ("-") into the calculation.

Specified value, bearing oversize = 0.5 to 0.8 mm

-	Larger determined bearing undersize (example -0.15 mm)
+	Shim(s) thickness, (= 0.3 mm)
=	Bearing pre-load (specified value = 0.5 to 0.8 mm)

Example:

1 shim: 0.15 mm + 0.3 mm = 0.15 mm, "bearing pre-load is too small"

3 Shims: -0.15 mm + 0.3 mm + 0.3 mm + 0.3 mm = 0.75 mm, "bearing pre-load is in the specified range"

Result: a 0.75 mm bearing pre-load within the specified value of 0.5 to 0.8 mm is reached by installing three 0.3 mm shims.

Continuation for all

Fig 6: Inserting Determined Number Of Shims

Courtesy of AUDI OF AMERICA, LLC

-- Replace the bearing bracket, the ball bearing and the circlip. Refer to LEFT FLANGE SHAFT BALL BEARING MOUNTING BRACKET, REMOVING AND INSTALLING .

-- Insert the determined number of shims 0B4 409 227 -item 1- into the bearing seat on the transmission before installing the flange shaft.

-- Install the left flange shaft. Refer to LEFT FLANGE SHAFT, REMOVING AND INSTALLING .