Final Drive/Transmission Housing Shaft Seal

Final Drive/Transmission Housing Shaft Seal

• A faulty shaft seal will allow gear oil to enter the torque converter bell housing.

• Automatic transmission clean working conditions, refer to => [ Clean Working Conditions ] Clean Working Conditions.

• General repair instructions, refer to => [ General Repair Information ] General Repair Information.

Special tools, testers and auxiliary items required

• Extractor Lever (VW 681)

• Thrust Piece (T10139)

Removing

• Transmission removed.

• Transmission, securing to assembly stand, refer to => [ Transmission, Securing to Assembly Stand ] Transmission, Securing to Assembly Stand


Do not place the transmission on the ATF cooler or oil pan.

- Remove the right flange shaft. Refer to => [ Right Flange Shaft ] Right Flange Shaft.

- Remove the final drive cover bolts in the sequence opposite the tightening sequence illustrated and remove the cover together with the tapered roller bearing outer race and shim.





• The shim must be the correct size and must not be replaced by a shim with a different thickness.

- Remove the differential.

- Remove the outer race for the differential tapered roller bearing - 1 - and the shim - 2 - located behind it from the transmission housing by hand.





• The shim must be the correct size and must not be replaced by a shim with a different thickness.

- Remove the left flange shaft. Refer to => [ Left Flange Shaft ] Left Flange Shaft.





- Remove shaft seal.

• Extractor lever must be positioned behind both sealing lips of the shaft seal. Do not position at outer circumference of shaft seal, otherwise the contact surface in transmission housing will be damaged. Guide the release lever carefully while prying out.

Installing

- Examine shaft seal seat in transmission housing for damage; if necessary rework.

- Coat outer circumference and sealing lip of shaft seal with axle oil.

• Push shaft seal onto pressure piece so that the projecting sealing lip of seal faces the tool.

- Drive on in new shaft seal as far as stop.





- Insert the shim - 2 - and the outer race for the differential tapered roller bearing - 1 - into the transmission housing by hand as far as the stop.





- Replace the O-ring - arrow -.





- Insert the differential into the transmission housing.

If the outer race for taper roller bearing and the shim have fallen out of cover for final drive:

- Lubricate the shim and tapered roller bearing outer race with gear oil and insert them into the front final drive cover as far as the stop.

- Install the final drive cover.





Tightening sequence:

- Tighten the bolts - 1 - and - 2 - to 3 Nm.

- Tighten bolts - 1 through 11 - in sequence shown to the tightening specification.

- Install the left flange shaft. Refer to => [ Left Flange Shaft ] Left Flange Shaft.

- Install the right flange shaft. Refer to => [ Right Flange Shaft ] Right Flange Shaft.

- Fill and check the oil level in the front final drive => [ Separate or Combined Oil Systems, Differentiation ] Separate or Combined Oil Systems, Differentiation.

Tightening Specifications