Overview - Center Differential

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: Center Differential Housing Overview

Courtesy of AUDI OF AMERICA, LLC

O-Ring
- Replacing
- Coat with transmission fluid
Center Differential
Ball Bearing
- For the center differential
- Refer to CENTER DIFFERENTIAL BALL BEARING, REMOVING AND INSTALLING
Circlip
- For the flange shaft ball bearing
Circlip
- For the flange shaft
Ball Bearing
- For the rear flange shaft
- Refer to REAR FLANGE SHAFT BALL BEARING, REMOVING AND INSTALLING
Sealing Plug
- 35 Nm
- Replacing
- For transfer case filler opening
Center Differential Housing
- Refer to CENTER DIFFERENTIAL, REMOVING AND INSTALLING
Seal for the Rear Flange Shaft
- Refer to REAR FLANGE SHAFT SEAL, REMOVING AND INSTALLING .
Rear Flange Shaft
- Removing and installing, refer to REAR FLANGE SHAFT SEAL, REMOVING AND INSTALLING .
- When replacing the rear flange shaft, also replace the seal
- Transmission fluid, allocate correct fluid.
Bolt
- Tightening specifications and sequence, -- Tighten bolts to 8 Nm in -1 to 6- sequence. -- Tighten the bolt in the following sequence: -1 through 6- plus 90° additional turn.
- Replacing

Fig 2: Center Differential Housing - Tightening Sequence

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the center differential housing bolts in three steps as follows:

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

-- Tighten bolts to 8 Nm in -1 to 6- sequence.

-- Tighten the bolt in the following sequence: -1 through 6- plus 90° additional turn.