33 10 016/17 Removing and Installing/Renewing Rear Differential (Dynamic Performance Control)

33 10 016 / 17 Removing and installing/renewing rear differential (Dynamic Performance Control)

Special tools required:





Warning!
Danger of injury!
Rear differential must be lashed with tensioning strap 33 5 206to prevent it from falling down during removal.





Necessary preliminary work:
^ Remove exhaust system.
^ Remove propeller shaft at final drive.





Release screws (1) from output shaft (2).

Installation Note:
^ Screws (1) and washers must be replaced!

Tightening torque 33 21 1AZ.





Important!
Risk of damage!
Output shafts must not under any circumstances rest on swinging arms.

Tape off output shafts or place a cloth on swinging arm.





Release screws (1) and remove heat shield (2).

Installation Note:
Clean screw threads to remove all remnants of screw locking adhesive.

Check threads on rear differential for damage and, if necessary, repair with Heli-Coil(R) thread inserts.

Make sure wiring harness (3) is correctly seated on rear differential.

Stick in new screws.

Tightening torque 33 11 4AZ.





Position special tool 33 0 110 in combination with 23 4 050 on workshop jack (1).





Support rear differential with the prepared special tool 24 4 050.

Lash rear differential with the tensioning strap 33 5 206.





Disconnect plug connections (1) on rear differential.

Unfasten ground strap (2).





Important!
Risk of damage!
To prevent the rubber mounts from overstretching when the bolts are pulled out, ensure the bolts remains in the rubber mounts.

Release screw (1).

Tightening torque 33 17 1AZ.

Installation Note:
Adhere to the installation sequence at the end of the document in order to prevent distortion of the rear axle final drive during installation and thereby avoid potential complaints about noise.





Release rear bolt (1).

Tightening torque 33 17 2AZ.

Slowly lower rear differential using workshop lifter.





Important!
Risk of damage!
Inclination on removal/ installation of the rear differential must not exceed 45°!
(Oils may mix via the common ventilation!)

Note:
Take rear differential down from special tool with assistance of a 2nd person and set down on a suitable surface.





Assembly sequence:
1. Install rear axle final drive with workshop jack and special tool 24 4 050 in rear axle support
2. Insert bolts (1) (do not tighten down)
3. Insert bolt (2) from rear (do not tighten down)
4. Release tensioning strap, lower special tool 24 4 050 and move away
5. Tighten down screws (1)
Tightening torque 33 17 1AZ
6. Tighten down screw (2)
Tightening torque 33 17 2AZ





After installation:
^ Check final drive oil level, correct if necessary.

Replacement only:
^ With BMW Diagnosis and Information System under:
- Control unit functions
Perform function check of transfer box (calibration)