Differential, Adjusting

Differential, Adjusting

Special tools, testers and auxiliary items required

• Dial Gauge Holder (VW 387)

• Magnetic Plate 50 mm Dia. (VW 385/17)

• Punch (VW 407)

• Thrust Pad (30 - 205)

• Torque Wrench (5-50 Nm) (V.A.G 1331)

• Kukko Extractor 46-58 mm (21/7)

• Kukko Support (22/2)

• Dial Gauge

A new differential adjustment is required when the following components have been replaced:

• Transmission housing

• Clutch housing

• Differential housing

or the

• Differential tapered roller bearing

Adjustment overview, refer to => [ Adjustment Overview ] Adjustment Overview.

Perform the following procedure:

- Press the tapered roller bearing outer race into transmission housing without shim, using (30 - 205), refer to => [ Installing the Outer
Race/Tapered Roller Bearing into the Transmission Housing ] Service and Repair.

• Bearing inner- and outer races of the tapered roller bearing are paired. Do not interchange them.

- Press the tapered roller bearing outer race into clutch housing, using (30 - 205), refer to => [ Installing the Outer
Race/Tapered Roller Bearing into the Clutch Housing ] Service and Repair.

- Insert the differential into the clutch housing.

- Install the transmission housing and tighten the five bolts to 25 Nm.

- Install the dial gauge and set it to "0" with a 1 mm preload.





- Move the differential up and down, read off the play on the dial gauge and note. (example: 0.70 mm).

Determining Shim Thickness

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

Example:






Example:






Adjustment Shim Table






• For the correct shims, refer to the Parts Catalog.

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





A Counter support, for example, (22/2)
B Internal puller 46 to 58 mm, for example, (21/7)

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

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

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

- Install the tapered roller bearing inner race again, refer to => [ Installing the Outer
Race/Tapered Roller Bearing into the Transmission Housing ] Service and Repair and secure the transmission housing.