Audi A6 Typ 4G: Flange Shaft Seals, Replacing, Rear Final Drive Removed
Overview - Drain and Inspection Plug for ATF and Gear Oil, Rear Final Drive 0BF and 0BE
Gear Oil Drain Plug on Rear Final Drive 0BF
1- Check plug for gear oil
- Tightening specification -item 22-.
- Always replace.
2- Gear oil drain plug
- Tightening specification -item 16-.
- Always replace.
Gear Oil Drain Plug on Rear Final Drive 0BE
1- Check plug for gear oil
- Tightening specification -item 22-.
- Always replace.
2- Gear oil drain plug
- Tightening specification -item 16-.
- Always replace.
Overview of the ATF Sealing Plugs on the Rear Final Drive 0BF
1- ATF check plug
- Identification "ATF" on the housing -arrow-
- Tightening specification -item 12-.
- Always replace.
2 - ATF drain plug
- Tightening specification -item 15-.
- Always replace.
Overview of the ATF Sealing Plugs on the Rear Final Drive 0BE
1- ATF check plug
- Identification "ATF" on the final drive housing -arrow-
- Tightening specification -item 12-.
- Always replace.
2 - ATF drain plug
- Tightening specification -item 15-.
- Always replace.
Gear Oil Level in Rear Final Drive 0BF and 0BE, Checking
Test Requirement
- Gear oil temperature: 10 ºC to 60 ºC (50 ºF to (140 ºF)
- The rear final drive must be in the installed position.
- The vehicle must be level.
- Overview of the gear oil sealing plugs. Refer to → Fig. "Gear Oil Drain Plug on Rear Final Drive 0BF" and → Fig. "Gear Oil Drain Plug on Rear Final Drive 0BE"
Special tools and workshop equipment required
- Drip Tray
Rear Final Drive 0BF
- Remove the gear oil check plug -arrow-, located on the right side of the final drive.
Rear Final Drive 0BE
- Remove the gear oil check plug -1-.
Continuation for All Rear Final Drives
- The oil level is correct when the rear final drive is filled up to the lower edge of the oil fill hole.
- If necessary fill the gear oil.
- Install the gear oil inspection plug -arrow- and tighten. Tightening specification -item 22-.
Gear Oil on Rear Final Drive 0BF and 0BE, Draining
Special tools and workshop equipment required
- Drip Tray
Rear Final Drive 0BF
- Remove the gear oil check plug -arrow-.
Note
- Gear oil sealing plug overview. Refer to → Fig. "Gear Oil Drain Plug on Rear Final Drive 0BF".
- Removing the gear oil check plug allows the gear oil to drain faster.
- Remove the drain plug -arrow- and drain the gear oil.
Rear Final Drive 0BE
- Remove the gear oil check plug -1-.
Note
- Gear oil sealing plug overview. Refer to → Fig. "Gear Oil Drain Plug on Rear Final Drive 0BE".
- Removing the gear oil check plug allows the gear oil to drain faster.
- Remove the drain plug -arrow- and drain the gear oil.
Continuation for All Rear Final Drives
- Install the new drain plug -arrow- and tighten it. Tightening Specification -item 16-.
Gear Oil in Rear Final Drive 0BF, Filling
Special tools and workshop equipment required
- Charging Device For Haldex Coupling 2 -VAS6291- or Charging Device For Haldex Coupling 2 -VAS6291A-
- Charging Device For Haldex Coupling 2 - Adapter 2 -VAS6291/2- or Charging Device For Haldex Coupling 2 - Adapter 3 -VAS6291/3-
- Drip Tray
- The rear final drive must be in the installed position.
- The vehicle must be level.
- Gear oil sealing plug overview. Refer to → Fig. "Gear Oil Drain Plug on Rear Final Drive 0BF".
- The gear oil drain plug is installed and tightened. Tightening Specification-item 16-.
- Oil specifications. Refer to the Parts Catalog.
- Use the Charging Device For Haldex Coupling 2 -VAS6291A- to fill.
- Lift the vehicle.
- Remove the gear oil check plug -arrow-.
- Disconnect the adapter -A- and elbow -B-.
- Screw in the adapter -A- all the way.
Caution
If it is not possible to install the adapter -A- in the threaded hole, then it will be necessary to slightly scrape off a housing rib -arrow-, for example, with a scraper.
Make sure the adapter -A- is not at an angle when installing it otherwise the thread on the plug will get damaged.
- Attach the elbow -B- to the adapter -A-.
- Route the hose over the right drive axle.
- The hose must not sag. It must be routed over the right rear wheel.
- Lower the vehicle.
- Make sure that the valve -arrow- is closed.
- Install the oil container -A- on the Charging Device For Haldex Coupling 2 -VAS6291A-.
- Open the valve -arrow- and hold the oil container as shown.
The rear final drive will not be filled.
- When at the correct filling of the rear final drive oil drips between the adapter -A- and the final drive housing -arrow-.
- Lift the vehicle.
- If oil leaks from adapter -A-, set down the fluid container (for example, on a tool cart).
A portion of the excess oil runs back into the oil container.
- If no more oil runs back, remove the Charging Device For Haldex Coupling 2 -VAS6291A-.
- The oil level is correct when the rear final drive is filled up to the lower edge of the oil fill hole.
- If necessary fill the gear oil again.
- Install the new gear oil check plug -arrow- and tighten. Tightening specification -item 22-.
Gear Oil in Rear Final Drive 0BE, Filling
Special tools and workshop equipment required
- Charging Device For Haldex Coupling 2 -VAS6291- or Charging Device For Haldex Coupling 2 -VAS6291A-
- Charging Device For Haldex Coupling 2 - Adapter 2 -VAS6291/2- or Charging Device For Haldex Coupling 2 - Adapter 3 -VAS6291/3-
- Drip Tray
- The rear final drive must be in the installed position.
- The vehicle must be level.
- Gear oil sealing plug overview. Refer to → Fig. "Gear Oil Drain Plug on Rear Final Drive 0BE".
- The gear oil drain plug is installed and tightened. Tightening specification -item 16-.
- Oil specifications. Refer to the Parts Catalog.
- Use the Charging Device For Haldex Coupling 2 -VAS6291A- to fill.
- Lift the vehicle.
- Remove the gear oil check plug -1-.
- Install the Charging Device For Haldex Coupling 2 - Adapter 1 -VAS6291/1- or Charging Device For Haldex Coupling 2 - Adapter 2 -VAS6291/2--1-.
- Attach the elbow -A- to the adapter -B-.
- Route the hose over the right drive axle.
- The hose must not sag. It must be routed over the right rear wheel.
- Lower the vehicle.
- Make sure that the valve -arrow- is closed.
- Install the oil container -A- on the Charging Device For Haldex Coupling 2 -VAS6291A-.
- Open the valve -arrow- and hold the oil container as shown.
The rear final drive will not be filled.
- When at the correct filling of the rear final drive oil drips between the adapter -B- and the final drive housing.
- Lift the vehicle.
- If oil leaks from the adapter -B-, set down the oil container (for example, on a tool trolley).
A portion of the excess oil runs back into the oil container.
- If no more oil runs back, remove the Charging Device For Haldex Coupling 2 -VAS6291A-.
- The oil level is correct when the rear final drive is filled up to the lower edge of the oil fill hole.
- If necessary fill the gear oil again.
- Install the new sealing plug -1- and tighten. Tightening specification -item 22-.
ATF Level in Rear Final Drive 0BF and 0BE, Checking
Test Requirement
- ATF temperature: 10 ºC to 60 ºC (50 ºF to (140 ºF)
- The rear final drive must be in the installed position.
- The vehicle must be level.
Special tools and workshop equipment required
- Drip Tray
- Remove the ATF check plug -1- to check the ATF level.
Caution
- The ATF check plug -1- is located on the left side of the rear final drive. Identification "ATF" on the final drive housing -arrow-
- ATF sealing plug overview. Refer to → Fig. "Overview of the ATF Sealing Plugs on the Rear Final Drive 0BE".
- The ATF level is correct when the rear final drive is filled to the lower edge of the fill hole.
If the ATF is correct:
- Install the new ATF check plug and fasten. Tightening specification -item 12-.
If the ATF is not correct:
- Fill with ATF. Refer to → Chapter "ATF on Rear Final Drive 0BF and 0BE, Filling".
ATF on Rear Final Drive 0BF and 0BE, Draining
Special tools and workshop equipment required
- Drip Tray
- Overview of the ATF sealing plugs. Refer to → Fig. "Overview of the ATF Sealing Plugs on the Rear Final Drive 0BF" and → Fig. "Overview of the ATF Sealing Plugs on the Rear Final Drive 0BE".
Rear Final Drive 0BF
- Remove the ATF check plug -arrow- so that the ATF drains faster.
- Remove the ATF drain plug -arrow- and drain the ATF.
- Install the new ATF drain plug -arrow- and tighten. Tightening specification -item 15-.
Rear Final Drive 0BE
- Remove the ATF check plug -1- so that the ATF drains faster out of the drain hole.
- Remove the ATF drain plug -2- and drain the ATF.
- Install the new ATF drain plug -2- and tighten. Tightening specification -item 15-.
Continuation for All Rear Final Drives
- Fill with ATF in the rear final drive. Refer to → Chapter "ATF on Rear Final Drive 0BF and 0BE, Filling".
ATF on Rear Final Drive 0BF and 0BE, Filling
Special tools and workshop equipment required
- Vehicle Diagnostic Tester
- Charging Device For Haldex Coupling 2 -VAS6291- or Charging Device For Haldex Coupling 2 -VAS6291A-
- Charging Device For Haldex Coupling 2 - Adapter 2 -VAS6291/2- or Charging Device For Haldex Coupling 2 - Adapter 3 -VAS6291/3-
- Drip Tray
Test Conditions
- The rear final drive must be in the installed position.
- The vehicle must be level.
- The ATF drain plug is installed and tightened. Tightening specification. -item 15-.
Caution
There is a risk of damaging the rear final drive.
- Only use ATF available as a replacement part. Refer to the Parts Catalog.
- Using other fluids can cause malfunctions or final drive failure.
- Note the allocation. Refer to the Parts Catalog
- The ATF filler tool must be clean and the ATF must not be mixed with any other oils.
- Use the Charging Device For Haldex Coupling 2 -VAS6291A- to fill.
- Lift the vehicle.
- Remove the ATF check plug -1-.
Caution
The ATF check plug -1- is located on the left side of the rear final drive. Identification "ATF" on the final drive housing -arrow-.
- Disconnect the adapter -A- and elbow -B-.
- Screw in the adapter -A- all the way.
- Attach the elbow -B- to the adapter -A-.
- Route the hose over the left drive axle.
- The hose must not sag. It must be routed over the left rear wheel on the vehicle.
- Lower the vehicle.
- Make sure that the valve -arrow- is closed.
- Install the oil container -A- on the Charging Device For Haldex Coupling 2 -VAS6291A-.
- Open the valve -arrow- and hold the oil container as shown.
The hydraulic control unit and the left and right chambers in the rear final drive are now filled.
- When the correct filling of the rear final drive hydraulic control module ATF drips from the adapter -A-
If there still is no ATF in the adapter -A-:
- Continue filling until the level is correct.
When ATF starts to leak out of the adapter -A-:
- Lift the vehicle.
- Place the oil container for example on a tool box.
A portion of the excess oil runs back into the oil container.
- If no more ATF runs back, remove the Charging Device For Haldex Coupling 2 -VAS6291A-.
- The oil level is correct when the rear final drive is filled up to the lower edge of the oil fill hole.
- Install the ATF check plug -arrow- hand-tight.
- Connect the Vehicle Diagnostic Tester and turn on the ignition.
- Select the function 22 - AWD Electronics in the Vehicle Diagnostic Tester under Guided Functions in the directory 22- ATF Filling.
- Follow all the instructions given by the Vehicle Diagnostic Tester exactly.
The system is filled and bled using the Vehicle Diagnostic Tester.
Note
Repeat the filling process if the system detects there is still air inside the system after performing the 22 - ATF Filling function.
- Remove the ATF check plug -arrow- again.
Test Condition
- The ATF level is correct when the rear final drive is filled up to the lower edge of the filler hole -arrow-.
- If necessary fill the ATF.
- In the DTC memory there is no entry and no "sporadic malfunction" use the Vehicle Diagnostic Tester.
- Install the new ATF check plug -arrow- and tighten. Tightening specification -item 12-.
