Determining Shim Thickness

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The specified bearing preload is obtained by adding a constant preload figure of 0.25 mm to the reading obtained.

Example:

Measured value	0.70 mm
+ Preload (constant value)	0.25 mm
Adjusting shim thickness =	0.95 mm

-- Remove the transmission housing.

-- Remove the tapered roller bearing outer race from the transmission housing.

Fig 1: Identifying Outer Race/Tapered Roller Bearing Pulled Out Of Transmission Housing

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

A -

Counter-support, for example, kukko Support 22/2

B -

Internal puller 46 to 58 mm, for example, kukko extractor 46-58 mm 21/7

-- Install the shim with the correct thickness, thickest shim first.

The Following Adjusting Shims Are Available:

Adjusting shim thickness (mm)
0.65	0.85	1.05	1.25
0.70	0.90	1.10
0.75	0.95	1.15
0.80	1.00	1.20

If the measured shim thickness is larger than those listed in the table, then install two shims that add up to the necessary thickness. Insert the thicker shim first.

Tolerance variations make it possible to find the exact shim thickness required.

-- Install the outer race and the transmission housing and tighten the bolts to specification, see TRANSMISSION HOUSING AND SHIFT UNIT .

Fig 2: Identifying Tapered Roller Bearing Outer Race Pressed In Transmission Housing

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.