Gearbox removal & installation: Fixing position of subframe — AUDI

🧭 Before you start

Fits: Audi Q7 (4M, 2015–)

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• The support elements will be attached to the gearbox support T40173 in a later step.
• Use engine and gearbox jackVAS 6931 to adjust for height in several steps.
• Risk of accident!All bolts and nuts must be fully tightened according to specifications before the vehicle is driven on public roads. — Install springs .
• Perform test drive after completing repair work. Wheel alignment must be checked and adjusted if the steering wheel is not straight .

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.

📋 Procedure

1. Remove support elements (1) from gearbox support T40173.
2. Turn mounting blocks (2) as shown in illustration and drill a hole (8.5 mm diameter) at point marked with (arrow).
3. Reattach mounting blocks (secure with bolts) and place to one side. [Note: The support elements will be attached to the gearbox support T40173 in a later step.]
4. Remove rear wheels .
5. Remove underbody trim on left and right General body repairs, exterior66Underbody trim; Removing and installing underbody trim.

6. Detach rear section of wheel housing liner (rear) on left and right and push slightly to one side General body repairs, exterior66Wheel housing liners; Removing and installing wheel housing liner (rear).
7. Vehicles without cutting point: Remove silencers 26Exhaust pipes/silencers; Removing and installing silencers.
8. Vehicles with cutting point: Remove exhaust pipe 26Exhaust pipes/silencers; Exploded view - silencers.
9. Vehicles with air suspension: Bleed system .
10. Remove springs (left and right) .
11. Use adjuster screw to tilt gearbox support T40173 towards rear (arrow).
12. Support subframe using engine and gearbox jackVAS 6931 and gearbox support T40173 on rear final drive, as shown in illustration.
13. Remove diagonal struts General body repairs, exterior66Underbody trim.
14. Tighten locating pins of locating device T40329 (left and right) to 20 Nm at front bonded rubber bushes. — 20 Nm (15 lb-ft)
15. Attach prepared supports elements (1) to gearbox support T40173 at threaded hole (2), as shown in illustration.
16. Use adjuster screw to tilt gearbox support T40173 forwards until mounting blocks (rear) make contact with subframe. [Note: Use engine and gearbox jackVAS 6931 to adjust for height in several steps.]
17. Secure subframe to engine and gearbox jack using tensioning strap.
18. ⚠ Risk of damage to threads of bolts securing subframe to body.DO NOT use an impact wrench when loosening or tightening the bolts that secure the subframe to the body.Always fit all bolts by hand; make the first few turns by hand. — One after the other, remove bolt (arrow) on left and right and screw in a locating pin for locating device T40329.
19. Tighten locating pins to 20 Nm. — 20 Nm (15 lb-ft)
20. Working in a diagonal sequence, unscrew only one locating pin at a time and screw in a new bolt in its place.
21. ⚠ Risk of accident!All bolts and nuts must be fully tightened according to specifications before the vehicle is driven on public roads. — Install springs .
22. Perform test drive after completing repair work. Wheel alignment must be checked and adjusted if the steering wheel is not straight .

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