Caution: The differential clutch oil is under very high pressure. To prevent injury, wait at least ten minutes before removing any differential clutch components.
Note: The following procedures require that the vehicle be level.
1. Raise and secure the vehicle.
2. Remove the ventilation hose connector (2) from the differential clutch cover.

Caution: It is very important to ensure maximum cleanliness when working on the differential clutch. Dirt particles can cause serious damage and reduce the service life of the differential clutch.
3. Remove the differential clutch cover to drain the working fluid.
Note: Do not use the old gasket. Always replace it with a new one.
4. Install the differential clutch cover.
5. Remove the ventilation hose (1).
6. Install the differential cover bolts and tighten to 6 Nm in a diagonal sequence. Repeat the tightening process to ensure proper sealing of the battery and filter.
Caution. The working fluids of the differential clutch and the rear axle main gear are different. Do not mix the working fluids, as this may cause serious damage to the vehicle.
(Original posted on the website: «Opelbook.ru»)
7. Pour 350 ml of the installed working fluid into the differential clutch through the opening of the ventilation hose connector.
8. Install the ventilation hose connector (2) and tighten to 14 Nm.
9. Install the ventilation hose (1).
10. Lower the vehicle.
11. To allow the oil level to stabilize, let the car stand for ten minutes with the ignition off.
12. Check the oil level in the differential clutch as described in the previous section.

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