Final Drive Sealing Ring/Transmission Housing, Replacing

Final drive sealing ring/transmission housing, replacing
Special tools and equipment





^ VVV681 extractor lever
^ 3383 double sealing ring installer
^ VAG 1306 drip tray
^ VAG 1358A - oil siphoning unit

Notes:
^ A faulty sealing ring lets ATF or gear oil escape into the converter housing via the center vent of the shaft seal (between the two sealing lips).
^ In addition, a faulty sealing ring can let ATF escape into the center differential. It over-fills and oil escapes at the differential vent

Removing
- Remove cover for front final drive.
- Pull out differential and remove.





- Remove tapered roller bearing outer race of differential -1- and shim 2- which is behind it from transmission housing by hand.

Note: Shim is pre-determined and must not be exchanged for a shim with another thickness.

- Remove left drive flange.





- Pullout seal.

Note: Extractor lever must be positioned behind both sealing lips of the sealing ring. Do not position at outer circumference of sealing ring, otherwise the contact surface in transmission housing will be damaged. When levering out, carefully guide extractor lever

Installing
- Check seal seat in transmission housing for damage; rework if necessary.
- Coat outer circumference and sealing lip of sealing ring with ATF.





- Slide seal onto 3383 double sealing ring installer so that the projecting sealing lip (arrow) of sealing ring faces tool.








- Drive in new sealing ring to stop.
- Install left drive flange.
- Insert adjustment shim -2- and tapered roller bearing outer race for differential -1- into transmission housing up to stop by hand.
- Insert differential into transmission housing.
- Install cover for front final drive.
- Install right drive flange.
- Install transmission support.
- Install right front exhaust pipe.
- Install drive axle.
- Top-up and check gear oil in front final drive.





Tightening torques