Rear Final Drive 0D2, Removing and installing. Audi Q7
Special tools and workshop equipment required
Caution
This procedure contains mandatory replaceable parts. Refer to component overview prior to starting procedure.
Mandatory Replacement Parts
Removing the Final Drive:
Pay attention to the general repair information. Refer to → Chapter "Repair Information".
- Place the vehicle on a hoist.
- Remove the driveshaft on the rear final drive. Refer to → Chapter "Drive Shaft, Removing from Rear Final Drive and Installing".
- Remove the bolts -1, 3 and 4- and the cover -2-.
- Remove the bolts -arrows- and the left drive axle heat shield -1-.
- Remove the bolts for the left and right drive axle -arrows-.
- Guide the drive axle out of the flange shaft and move it to the side.
- Vehicles with air suspension: remove the nuts -arrows- and remove the cover for the air supply unit -1-.
- Remove the nut -1-.
- Place the -VAS6931- with the Universal Transmission Support under the rear final drive.
- Remove the bolt -2-.
- Remove the bolts for the rear final drive -arrows-.
- Carefully lower the rear final drive.
Installing the Final Drive:
Install in reverse order of removal. Note the following:
- Bring the rear final drive with the -VAS6931- and Universal Transmission Support into the installation position.
- Install the bolt -2- hand-tight.
- Install the bolts -arrows- for the rear final drive and tighten.
- Tighten the bolt -2- and nut -1-.
- Remove the -VAS6931- from under the final drive.
- Insert and tighten the drive axles. Refer to → Suspension, Wheels, Steering; Rep. Gr.42; Drive Axle; Drive Axle, Removing and Installing.
- Install the left flange shaft heat shield -1-.
- Install the driveshaft on the rear final drive. Refer to → Fig. "Install the Driveshaft on the Rear Final Drive.".
- Check the gear oil level in the rear final drive. Refer to → Chapter "Gear Oil, Checking Level".
- Install the underbody trim panel. Refer to → Body Exterior; Rep. Gr.66; Underbody Trim Panel; Underbody Trim Panels, Removing and Installing.
Rear Final Drive 0DB, 0D2 and 0D3, Removing and Installing, "Sport Differential", Audi A4
Special tools and workshop equipment required
Caution
This procedure contains mandatory replaceable parts. Refer to component overview prior to starting procedure.
Mandatory Replacement Parts
Final Drive, Removing:
Pay attention to the general repair information. Refer to → Chapter "Repair Information".
- Place the vehicle on a hoist.
NOTICE
Incorrect handling can damage the coupling.
- Do not bend the coupling more than 10º.
- Do not load the coupling.
- Loosen the lock washer(s) -arrows- and separate the exhaust system.
- Tie up the front exhaust pipe(s) on the side to the underbody.
- Remove the rear section of the exhaust system. Refer to → Rep. Gr.26; Exhaust Pipes/Mufflers; Overview - Muffler.
- Remove the driveshaft on the rear final drive. Refer to → Chapter "Drive Shaft, Removing from Rear Final Drive and Installing".
- Remove the bolts -arrows- for the right and left stabilizer bar clamp.
- Tilt the stabilizer bar slightly downward.
Final Drive 0D3 "Sport Differential"
- Remove the bolts -arrows- and remove the bracket -1- from the rear final drive.
- Mark the connectors -2- for the Oil Pressure/Temperature Sensor and on the Clutch Valves.
- Disconnect the connectors -2- from the Oil Pressure/Temperature Sensor and the Clutch Valves.
- Disconnect the connector -4- from the AWD Pump -V415-.
- Unclip the wiring harness -3- from the final drive and the subframe and tie it up -5 through 7-.
- Remove the heat shield -A- for the left and right drive axles from the rear final drive -arrows-.
Final Drive 0DB and 0D2
- Remove the bolts -arrows- and the left drive axle heat shield -1-.
- Remove the bolts for the left and right drive axle -arrows-.
Continuation for All
Lower the rear subframe as follows:
- Remove both rear subframe bolts -arrows- straight until the distance on the right and left side to the longitudinal member is 18 mm.
- Move the - VAS6931- with the Universal Transmission Support and a rubber or hard foam mat -A- under the rear final drive.
- Use a -T10038- to secure the rear final drive from falling.
- Remove the nuts -1-, if present.
- Remove the bolt -2-.
- Remove the bolts for the rear final drive -arrows-.
- Press the rear final drive in the direction of -arrow- towards the right side of the vehicle.
- While doing so, guide the left drive axle -1- upward out of the flange shaft -2-.
- Then remove the right drive axle.
- Carefully lower the rear final drive.
- Go past the stabilizer bar when lowering.
Final Drive, Installing:
Install in reverse order of removal. Note the following:
Final Drive 0D3 "Sport Differential"
Continuation for All
- Bring the rear final drive with the -VAS6931- and Universal Transmission Support into the installation position.
-A- = rubber or hard foam mat
- Insert the right drive axle into the final drive flange shaft.
- Press the final drive in the direction of -arrow- towards the right side of the vehicle.
- Guide the left drive axle -1- into the flange shaft -2-.
- Install the bolt -2- hand-tight.
- Install the new bolts for the rear final drive -arrows- and tighten.
- Tighten the bolt -2- and nut -1-.
- Tighten the subframe bolts -arrows-. Refer to → Suspension, Wheels, Steering; Rep. Gr.42; Subframe; Overview - Subframe.
- Remove the -VAS6931- from under the final drive.
- Tighten the stabilizer bar -arrows-. Refer to → Suspension, Wheels, Steering; Rep. Gr.42; Stabilizer Bar; Overview - Stabilizer Bar.
- Install the driveshaft on the rear final drive. Refer to → Fig. "Install the Driveshaft on the Rear Final Drive.".
- Tighten the drive axle. Refer to → Suspension, Wheels, Steering; Rep. Gr.42; Drive Axle; Drive Axle, Removing and Installing.
- Install the heat shield -1- for the left drive axle, if equipped.
Final Drive 0D3 "Sport Differential"
- Attach the drive axle heat shield -A- to the rear final drive -arrows- . Tightening specification: 20 Nm.
- Install the wiring harness -3- to the final drive and subframe -5 through 7-.
- Connect the connectors -4 and 2-. Pay attention to the marks made during the removal, that identify the allocation to the Oil Pressure/Temperature Sensor and which connectors go to the Clutch Valves.
NOTICE
Wiring Harness, Clamping
Wiring harness damage
- Make sure the wiring harness -3- does not get pinched when installing the bracket -1- to the rear final drive.
- Attach the bracket -1- to the rear final drive and tighten the bolts -arrows-. Tightening specification: 9 Nm
Allocation of the connectors for the Oil Pressure/Temperature Sensor and Clutch Valves:
- Check the ATF inside the rear final drive. Refer to → Chapter "ATF Level, Checking, 0D3 Sport Differential".
Continuation for All
- Check the gear oil level in the rear final drive. Refer to → Chapter "Gear Oil, Checking Level".
- Install the rear exhaust system and align it without tension. Refer to → Rep. Gr.26; Exhaust Pipes/Mufflers; Overview - Muffler.
Final Drive 0D3 "Sport Differential"
Final Drive 0D3 "Sport Differential", Additional Work after Replacing
Procedure:
- Connect the Vehicle Diagnostic Tester and turn on the ignition.
- Select the function 22 - Rear Final Drive Replacing in the vehicle diagnostic tester under Guided Functions in the directory 22- AWD Electronics.
The new rear final drive is "adapted" on the AWD Control Module -J492- using the Vehicle Diagnostic Tester.