Draining and filling gear oil - front final drive (gearbox with separate oil systems) — AUDI

🧭 Before you start

Fits: Audi A6/A7 C7 (4G, 2011–2018)

• Opens: gearbox oil
• Special tools named: VAS 6617/6, VAS 6617/2

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• Risk of eye injury.Wear safety goggles. — Unscrew drain plug (arrow B) on front final drive and drain off gear oil.
• Risk of damage to gearboxThe engine must not be started when there is no more gear oil in the front final drive. — Tighten new drain plug (arrow B) on front final drive.
• Risk of eye injury.Wear safety goggles. — Unscrew plug for inspection and filler hole (arrow A) on front final drive.
• It is necessary to wait for at least 5 minutes to allow the internal oil level to balance out between the differential and the baffle chamber.
• The level does not need to be re-checked after this step.

📋 Procedure

1. Remove rear noise insulation (2)General body repairs, exterior 66. Noise insulation; Removing and installing noise insulation.
2. Remove bolts (arrows) and detach heat shield (right-side) (1).
3. Audi RS 6: Remove bolts (1, 2) and push coolant pipe (right-side) on gearbox to one side.
4. Place used oil collection and extraction unit VAS 6622 below gearbox.
5. ⚠ Risk of eye injury. Wear safety goggles. — Unscrew drain plug (arrow B) on front final drive and drain off gear oil.

6. ⚠ Risk of damage to gearboxThe engine must not be started when there is no more gear oil in the front final drive. — Tighten new drain plug (arrow B) on front final drive.
7. Place used oil collection and extraction unit VAS 6622 below gearbox.
8. ⚠ Risk of eye injury. Wear safety goggles. — Unscrew plug for inspection and filler hole (arrow A) on front final drive.
9. Screw adapter VAS 6617/6 with adapter VAS 6617/2 hand-tight into inspection and filler hole for front final drive.
10. Connect hand pump for filling gearbox VAS 6617 and fill up front final drive with approx. 1.0 ltr. of gear oil.
11. Wait for 5 minutes. [Note: It is necessary to wait for at least 5 minutes to allow the internal oil level to balance out between the differential and the baffle chamber.]
12. Then detach VAS 6617/6 from gearbox and allow excess gear oil to drain off.
13. Tighten new plug (arrow A) on front final drive. [Note: The level does not need to be re-checked after this step.]
14. Audi RS 6: Install coolant pipe on gearbox (right-side) 19Coolant pipes; Removing and installing coolant pipes.

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