SEAT Workshop Service and Repair Manuals

Differential: Adjust The differential should always be readjusted when any of the following components have been changed: t  Gearbox t  clutch housing t  Differential casing t  Differential roller bearings Adjustment chart → Chapter. Check the tool and equipment equivalence table according to the applicability between Seat / VW / Audi / Skoda → Chapter.

Special tools and workshop equipment required

t	Bracket -T20020-, see equivalent → Anchor

t	Extractor kit -T20140-, see equivalent → Anchor

t	Hose clamp -U 10103-, see equivalent → Anchor

t	Kit (case) -U 40200A-, see equivalent → Anchor

t	Kit (case) -U 40300-, see equivalent → Anchor

t	Kit (case) -U 40450A-, see equivalent → Anchor

Insert the outer ring of the roller bearing into the clutch casing l  Press tapered roller bearing with shim (0.65 mm thick) into clutch housing. –  Press the gearbox casing directly onto the base of the bearing using the kit (case) -U 40200A- .   Note The tapered roller bearing inner and outer races are paired. Do not mix them up.

Fitting the outer ring of the roller bearing into the gearbox casing –  Support the gearbox casing on the adapter -U 40450/1- with the adapter -U 40450/11-, theadapter -U 40450/4-, the adapter -U 40450/5- and the adapter -U 40450/10- and as a base for connecting the inner ring, the installation tool -U 10103-. –  Insert the differential on the clutch casing. –  Fit on the gearbox casing and tighten the 5 bolts with the correct torque. –  Press the differential towards the clutch casing rotating it 8 times. –  Press the differential towards the gearbox casing rotating it 8 times. –  Fit the support -T20020- and the measurement tool together onto the gearbox casing.

–  Fit the gauge and set to “0” with a pretension of 1 mm. A -  30 mm gauge extension –  Move the differential gear up and down while reading the measurement on the gauge and noting the results (for example: 0.70 mm). Determining thickness of shim: The specified pre-tension for the bearing is obtained by adding a constant pressure value (0.25) to the measured value.

Example:
Average value	0,70 mm
+ Pressure (const. value)	0,25 mm
Shim thickness =	0,95 mm

–  Determine washer or shim thickness using the table; part number → Current parts catalogue. The following shims are used:

Thickness of shims → Note → Note in 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

1)  If the thickness of the shim required is larger than indicated on the table, two shims may be fitted to achieve the required thickness. In this case, fit the thicker shim first. 2)  The existence of different tolerances allows the necessary shim thickness to be selected precisely. –  Remove the gearbox casing.

Remove the outer ring of the roller bearing from the gearbox casing –  Use the extractor kit -T20140- with adaptor -T20140/30-. –  Fit the washer or shims of the required thickness (thickest first). –  Press outer race in again and tighten gearbox housing to specified torque.

Fitting the outer ring of the roller bearing into the gearbox casing –  Support the gearbox casing on the adapter -U 40450/1- with the adapter -U 40450/11-, theadapter -U 40450/4-, the adapter -U 40450/5- and the adapter -U 40450/10- and as a base for connecting the inner ring, the installation tool -U 10103-.