Checking gear oil level in gearbox (gearbox with common oil system) — AUDI

🧭 Before you start

Fits: Audi A8 D3 (4E, 2002–2010)

• Opens: gearbox oil
• Renewed: oil filler/inspection plugs

Don't miss

• Mark installation position of tunnel cross member for gearbox on body.
• Gearbox must be in horizontal installation position when checking gear oil.It must be raised or lowered accordingly using engine and gearbox jackV.A.G 1383 A after removing tunnel cross member.
• Oil filler/inspection plug for transfer box is located on side of transfer box housing and is inserted from below (arrow).Illustration shows sectional view of transfer box from rear side with gear oil level and filler opening.
• The level does not need to be re-checked after this step.
• Always renew oil filler/inspection plugs.

📋 Procedure

1. Loosen bolts (2), (3) and (4) and remove both rear noise insulation panels.
2. ⚠ When performing the steps below, please note the following:Do not support the gearbox under the oil pan - risk of damage. — Insert a bolt M12x100 (item 1) with attached nut (2) into the mounting hole behind the oil pan on the gearbox.
3. Apply lifting column of engine and gearbox jackV.A.G 1383 A to bolt head as illustrated and raise gearbox slightly.
4. Remove bracket for noise insulation below ATF cooler.
5. If fitted, detach bracket for electrical connectors (1) and (2) for lambda probes from tunnel cross member (arrows).

6. Mark installation position of tunnel cross member for gearbox on body.
7. Remove bolts securing gearbox mountings (left (1) and right (2)) to tunnel cross member.
8. Unbolt tunnel cross member for gearbox from body (arrows).
9. Use engine and gearbox jackV.A.G 1383 A to lower or raise gearbox until it is in horizontal installation position again. [Note: Gearbox must be in horizontal installation position when checking gear oil.It must be raised or lowered accordingly using engine and gearbox jackV.A.G 1383 A after removing tunnel cross member.]
10. Push tunnel cross member as far as possible towards rear so that oil filler/inspection plug (arrow) for transfer box is accessible.
11. Place used oil collection and extraction unitV.A.G 1782 below gearbox.
12. ⚠ Wear safety goggles. — Remove oil filler/inspection plug (arrow) for transfer box. [Note: Oil filler/inspection plug for transfer box is located on side of transfer box housing and is inserted from below (arrow).Illustration shows sectional view of transfer box from rear side with gear oil level and filler opening.]
13. Remove oil filler/inspection plug (arrow) for front final drive.
14. Using hand pump for gear oilVAS 6617, slowly fill front final drive until gear oil emerges at bottom lip of oil filler hole (arrow).
15. Using hand pump for gear oilVAS 6617, fill gear oil slowly into transfer box housing through oil filler hole on transfer box (arrow).
16. Top up gear oil again until oil level is correct.
17. Allow excess gear oil to drain out of opening until oil level in transfer box is correct. [Note: The level does not need to be re-checked after this step.]
18. Always renew oil filler/inspection plugs.
19. Install tunnel cross member .

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