Replacing sealing ring final drive/gearbox housing — AUDI

01V 01VA
Special tools,
testers and auxiliary items required

Extractor lever VW 681
Thrust pad 3383
Drip tray V.A.G 1306
V.A.G 1358 A Oil extractor

Notes:

A damaged sealing ring allows ATF or gear oil to leak into torque converter bell housing via centre breather of shaft ring.
Furthermore, a damaged sealing ring allows ATF to enter the differential. This is being overfilled and oil leaks at the breather of the differential.

Removing

Bolt drive shaft/wheel hub whilst the vehicle is standing on its wheels.
Remove front wheels.

Unbolt the heat shield for right drive shaft.
Remove drive shafts:

=> Running Gear, FWD and 4WD; Repair group 40; Removing and installing drive shaft
Running Gear, FWD and 4WD
Removing and installing drive shaft

Remove bolt for flange shaft -arrow-. Whilst doing this secure flange shaft with drift against turning.
Extract gear oil from final drive with oil extractor V.A.G 1358 A.
Place drip tray V.A.G 1306 underneath.
Pull out the right flange shaft.
Remove the right gearbox support => Page
37-124
.

Unscrew bolts of cover for final drive in the reverse sequence to that shown and remove cover.
Pull out differential and remove.

Manually remove taper roller bearing outer race of differential -1- and shim behind -2- from gearbox housing.

Note:

The shim is fitted and must not be exchanged for a shim with different thickness.

Remove the left flange shaft => Page
39-13
.
Pull out sealing ring.

Note:

The levering tool must be positioned behind the two sealing lips of the sealing ring. Do not position at outer ring of sealing ring as the contact surface in the gearbox housing could be damaged. When levering, guide levering tool carefully.

Installing

Check oil seal seat in gearbox housing for damage and rework, if necessary.
Lightly lubricate outer circumference and sealing lips of seal with ATF.
Slide the double oil seal onto the thrust pad 3383 such that the larger, protruding sealing lip -arrow- of the oil seal faces the tool.

Drive in new seal as far as stop.

Install left flange shaft => Page
39-22
.
Insert shim -2- and taper roller bearing outer race for differential -1- by hand until stop into gearbox housing.

Renew the O-ring -arrow-.
Fit differential into gearbox housing.

Install cover for final drive.

Tightening sequence:

1. Stage 1: Replace bolts -1 ... 3- Tighten by hand
2. Stage 1: Replace bolts -1 ... 12- Tighten in given sequence to tightening torque

Install right flange shaft.
Installing right gearbox support => Page
37-124
.
Install drive shafts.

=> Running Gear, FWD and 4WD; Repair group 40; Removing and installing drive shaft
Running Gear, FWD and 4WD
Removing and installing drive shaft

-Top up gear oil in front final drive and check oil level => Page
39-1
.

Tightening torques

Component · Nm
Cover for front final drive at gearbox housing · / 23
Mounting bracket for left flange shaft to gearbox · / 23
Flange shaft to gearbox · 23
Drive shaft to flange shaft M10 · 77
Drive shaft to flange shaft M8 · 39
Heat shield for drive shaft to gearbox · / 23