Renewing propshaft flange seal: Audi (ABCD)

🧭 Before you start

Fits: platform codes S1, 2H

• Special tools named: puller
• Renewed: seal, sealing sleeve, compression sleeve

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• Bolt counterhold tool T50050 to propshaft flange.
• Do not damage axle body when driving out seal. — Drive in new seal flush using thrust piece T50018
• If bearing is not without play, specified torque can be increased in 10 Nm steps to max. 60 Nm. Renew compression sleeve if bearing is not yet without play after the nut has been tightened to 60 Nm.
• Remove counterhold tool T50050.
• Mark position of drive pinion in relation to one edge of nut.

🔧 Engine codes this applies to

📋 Procedure

1. ⚠ If the seal is renewed, the friction torque must be determined prior to starting repair work .If the friction torque has not been determined before removal, the compression sleeve and the drive pinion bearings will have to be renewed. — Remove rear brake drums Brake system46Rear brakes; Assembly overview - rear brakes.
2. Unbolt propshaft from rear axle .
3. Secure propshaft to body.
4. Check drive pinion bearing for axial play (no play permitted).
5. Measure friction torque on propshaft flange with a commercially available 32 mm socket, bearing preload gaugeVAS 6523 and e.g. cordless power driver 12 V/1.4 AhVAS 5825.

6. ⚠ To avoid incorrect measurements, measure friction torque at approx. 50 rpm and turning at least 5 times.Perform measurements carefully and accurately to prevent replacement of axle body.Do not take any actions to alter friction torque before installing seal on axle. — Note the determined "“actual friction torque value”".
7. Release nut (arrow).
8. Bolt counterhold tool T50050 to propshaft flange.
9. Using socket 32 mm T10209 and torque wrenchVAS 5088, loosen nut.
10. Fit puller, as shown, and pull off propshaft flange.
11. Drive out seal (1) using a chisel. [Note: Remove any sealant residue from drive pinion and propshaft flange.If leaks are detected during repair work on the flange, always renew the seal .Check the contact surface of the propshaft flange seal for traces of wear. Renew sealing sleeve if necessary .Before fitting the flange, seal the splines between the drive pinion and the flange with locking fluidElectronic Parts Catalogue.]
12. ⚠ Do not damage axle body when driving out seal. — Drive in new seal flush using thrust piece T50018
13. Install propshaft flange with new securing nut.
14. Bolt counterhold tool T50050 to propshaft flange.
15. Using socket 32 mm T10209, tighten nut (arrow).
16. Check drive pinion bearing for axial play (no play permitted). [Note: If bearing is not without play, specified torque can be increased in 10 Nm steps to max. 60 Nm. Renew compression sleeve if bearing is not yet without play after the nut has been tightened to 60 Nm.]
17. Remove counterhold tool T50050.
18. To align tapered roller bearings, rotate propshaft flange 15 times in clockwise and 15 times in anti-clockwise direction (see (arrows)).
19. Mark position of drive pinion in relation to one edge of nut.
20. Bolt counterhold tool T50050 to propshaft flange.
21. Using 32 mm socket T10209, tighten nut by another 15°.
22. Remove counterhold tool T50050.
23. To align tapered roller bearings, rotate propshaft flange 15 times in clockwise and 15 times in anti-clockwise direction (see (arrows)).
24. Bolt counterhold tool T50050 to propshaft flange.
25. Tighten securing nut 15° further using 32 mm socket T10209.
26. Remove counterhold tool T50050.
27. To align tapered roller bearings, rotate propshaft flange 15 times in clockwise and 15 times in anti-clockwise direction (see (arrows)).
28. Using 32 mm socket T10209, bearing preload gaugeVAS 6523 and e.g. cordless power driver 12 V/1.4 AhVAS 5825, measure friction torque on propshaft flange. [Note: To avoid incorrect measurements, measure friction value at approx. 50 rpm and turning at least 5 times.]
29. ⚠ If the determined friction torque is too low, tighten nut in small steps. Then, align propshaft flange again (rotate 15 times in clockwise and 15 times in anticlockwise direction). After that, determine friction torque again. Repeat this procedure until the friction torque is within the specified range.It is very likely that this procedure has to be repeated several times.It is not permitted for friction torque to be attained by loosening securing nut. Renew the compression sleeve if the permissible friction torque has been exceeded . The drive pinion must be removed for this purpose. — Secure securing nut by peening.
30. Install propshaft .
31. Install brake drums Brake system46Rear brakes; Assembly overview - rear brakes
32. Operate brake pedal several times until brake shoes are in contact with brake drum.
33. Check oil level and top up if necessary .

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