Overview - Center Differential

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CAUTION:

Danger of causing damage to the transmission.

Do not start or tow the vehicle when the center differential is removed or when the gear oil has been drained.

Fig 1: Overview Of Center Differential

Courtesy of AUDI OF AMERICA, LLC

Bolt
- 20 Nm +90° turn
- Replacing
Bolt
- Tightening sequence and tightening specification, refer to Fig 2
- Replacing
Center Differential Housing
- Removing and installing, refer to CENTER DIFFERENTIAL, REMOVING AND INSTALLING
O-Ring
- Replacing
- Coat with transmission fluid
Center Differential
Ball Bearing
- for the center differential
- Removing and installing, refer to CENTER DIFFERENTIAL BALL BEARING, REMOVING AND INSTALLING
Locking Ring
- For the ball bearing on the transmission output shaft with splines
Locking Ring
- For the transmission output shaft with splines
Ball Bearing
- For the transmission output shaft with splines
- Replacing, refer to TRANSMISSION OUTPUT SHAFT BALL BEARING, REPLACING
Balance Weight
- Installed depending on the version
Shaft Seal
- For the transmission output shaft with splines
- Replacing, refer to TRANSMISSION OUTPUT SHAFT SEAL, REPLACING, VEHICLES WITH SPLINES AND WITHOUT VIBRATION DAMPER
- Replacing, refer to TRANSMISSION OUTPUT SHAFT SEAL, REPLACING, VEHICLES WITH SPLINE AND VIBRATION DAMPER
Transmission Output Shaft with Splines
- without vibration damper
- Allocation, refer to parts.
- Removing and installing, refer to TRANSMISSION OUTPUT SHAFT, REMOVING AND INSTALLING
- Replace the shaft seal when replacing the transmission output shaft with splines
Dust Ring
- Replace after removing
Transmission Output Shaft with Splines
- With vibration damper
- Allocation, refer to parts.
- Removing and installing, refer to TRANSMISSION OUTPUT SHAFT, REMOVING AND INSTALLING
- Replace the shaft seal when replacing the transmission output shaft with splines

Fig 2: Center Differential Housing Bolts - Loosening And Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

NOTE:

Replace the bolts for the center differential housing.

-- Tighten the bolts in three steps according to the listed sequence:

Step	Bolts	Tightening Specification/Additional Turn
1.	-1- and -6-	3 Nm
2.	-1 to 6-	10 Nm
3.	-1 to 6-	Tighten an additional 90°