Removing and installing centre differential housing with gearbox removed — AUDI

🧭 Before you start

Fits: Audi A8 D3 (4E, 2002–2010), Audi A6 C6 (4F, 2004–2011)

• Renewed: o-ring

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• The cover does not have a drain plug; gear oil can only be drained by removing the cover.
• Renew O-ring on cover for transfer box.
• Check installation position of tongue on baffle plate (arrow) again.
• After installing gearbox, fill up gear oil in gearbox Automatic gearbox 09E, four-wheel drive39.

📋 Procedure

1. Place used oil collection and extraction unitV.A.G 1782 below gearbox.
2. ⚠ Wear safety goggles. — Slacken and remove securing bolts for cover for self-locking centre differential in the sequence (6 ... 1) and allow gear oil to drain out. [Note: The cover does not have a drain plug; gear oil can only be drained by removing the cover.]
3. ⚠ Detach centre differential housing from gearbox carefully towards the rear. Take care that self-locking centre differential does not drop out of gearbox. — Secure self-locking centre differential (B) and baffle plate (A) to prevent them dropping out, or pull them off the output shaft towards the rear. [Note: Renew O-ring on cover for transfer box.]
4. Clean baffle plate, lubricate with gear oil and insert in gearbox.
5. Fit self-locking centre differential (B) onto splines of output shaft (turn slightly at the same time). [Note: Check installation position of tongue on baffle plate (arrow) again.]

6. Check that self-locking centre differential can be turned by hand when it is in position.
7. Check whether the tongue (arrow) on the baffle plate is still located properly.
8. If necessary, renew oil seal for flange shaft (rear) .
9. Renew O-ring on centre differential housing.
10. Fit centre differential housing onto self-locking centre differential with shaft installed; turn slightly if necessary.
11. Tighten bolts on centre differential housing in specified sequence to final torque .
12. After installing gearbox, fill up gear oil in gearbox Automatic gearbox 09E, four-wheel drive39.

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