SEAT Workshop Service and Repair Manuals

Differential: Adjust Check the tool and equipment equivalence table according to the applicability between Seat / VW / Audi / Skoda → Chapter.

Special tools and workshop equipment required

t	Torque wrench kit -SAT 8010-, see equivalent → Anchor

t	Bracket -T20020-, see equivalent → Anchor

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

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

Adjust the differential when one of the following elements has been replaced: t  Gearbox t  clutch housing t  Differential casing t  Differential roller bearing Refer to Adjustment chart → Chapter

–  Remove the outer roller bearing track from the differential, in the gearbox and clutch housing, with adapter -U 40200/10- and adapter -U 40300/14-.   Note t  The procedure and tools needed to remove the secondary shaft rear bearings outer tracks, are identical in the gearbox casing and the clutch housing. t  To remove outer track of clutch casing, first remove socket for right articulation flange seal → Chapter, Gearbox housing and clutch housing: repairs. t  The roller bearings and their corresponding outer tracks are matched pairs. Do not mix with other bearings.

–  Install the outer roller bearing track from the differential, in the gearbox and clutch housing, without shims, with adapter -U 40200/10- and adapter -U 40300/12-.   Note The procedure and tools needed to install the secondary shaft rear bearings outer tracks, are identical in the gearbox casing and the clutch housing. –  Place the differential on the clutch housing. –  Assemble the gearbox casing on the clutch housing and tighten the securing bolts to 25 Nm + 90º.

–  Install support -T20020- with a dial gauge on the gearbox housing. Place its end on the differential, inserting the adapter -U 40300/13-. –  Adjust the dial gauge to “0” with a pre-tension of 1 mm. –  Move the differential alternately in the direction of the arrows. –  Note reading on comparator (e.g. 0.70 mm).   Note When measuring do not turn the differential, because the roller bearings may settle and the reading would be erroneous. Shim calculation table The specified pre-tension of the bearing is obtained by adding a constant pressure value (0.40 mm) to the obtained measurement value (in the example: 0.70mm). Example:

Average value		0.70 mm
+ Pressure value (const. value)		0.40 mm
Thickness of shim		1.10 mm

The shim needed will be determined by the following table:

Thickness (mm)
0,65 0,70 0,75	→ Parts Catalogue.
0,80 0,85 0,90
0,95 1,00 1,05
1,10 1,15 1,20
1,25

The existence of different tolerances allows the exact calibration of the thickness of the shim needed. If the thickness needed is greater than those indicated on the table, two shims can be used that add up to the determined value. –  Once the necessary shim has been determined, remove the dial gauge. –  Remove the bolts that secure both casings and remove the gearbox casing. –  Separate the differential.

–  Remove the outer conical roller bearing track of the differential from the gearbox housing with the adaptor -U 40200/10- and the adaptor -U 40300/14-. –  Install the shim shaft with the calculated thickness (1.10 mm in the example) in the housing of the differential outer roller bearing track in the gearbox casing. –  If it is necessary to fit two shims, place the thickest one first.

–  Mount the outer conical roller bearing track of the differential on the gearbox housing with the adaptor -U 40200/10- and the adaptor -U 40300/12-. –  Place the differential on the clutch housing. –  Assemble the gearbox casing on the clutch housing and tighten the securing bolts to 25 Nm + 90º.