Volkswagen Workshop Service and Repair Manuals

(Shims S1 and S2)

The differential must be adjusted if the:

• Gearbox housing
• Bearing housing
• Differential housing
• or the differential bearings

have been replaced.

See also "Adjustment table"

• ‒ → Install outer race of taper roller bearing (end opposite to crown wheel) in bearing housing with shim S2.

• Shim S2 is always 1 mm thick.

• ‒ Drive outer race of bearing (crown wheel end) into the gearbox housing without a shim.

• ‒ Install differential in the bearing housing.
• ‒ Place gearbox housing in position with a gasket and tighten 5 bolts to 25 Nm.
• ‒ → Install dial gauge and zero with 1 mm preload.

• Move differential up and down and record dial gauge reading (example 0.90 mm).

Finding thickness of S1 shim

The specified bearing preload is obtained by adding a constant figure to the measured reading to find S1.

• ‒ → Take gearbox housing off and knock bearing outer race out.
• ‒ Insert shim S1 of correct thickness as determined thickness shim (1 mm if possible) first.

The following shims are available:

Different tolerances make it possible to select exactly the required shim thickness.

Knock outer race in again and install gearbox housing complete with gasket.

→ A - Torque gauge, normal type 0 - 600 Ncm

Checking turning torque

This should be 120-350 Ncm for new bearings.

On bearings which have been in use the torque should be at least 30 Ncm.

Lubricate bearings beforehand with hypoid gear oil.