33 10 010/ 33 10 016 / 17 Removing and installing/replacing rear differential (Dynamic Performance Control): Notes

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Special tools required:

23 4 050
24 4 050
33 0 110
33 5 206

WARNING: Risk of injury!

Rear differential must be lashed with tightening strap 33 5 206 to prevent it falling out during removal.

Necessary preliminary tasks:

Remove exhaust system.
Remove propeller shaft on rear differential.

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

Installation:

Screws (1) and washers must be replaced!

Tightening torque 33 21 1AZ .

Fig 1: Identifying Output Shaft Screws

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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.

Fig 2: Identifying Output Shaft Damage Area

Courtesy of BMW OF NORTH AMERICA, INC.

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

Installation:

Clean screw threads to remove all remnants of screw securing adhesive.

Check threads on rear differential for damage and, if necessary, repair with HELICOIL THREAD INSERTS .

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

Stick in new screws.

Tightening torque 33 11 4AZ .

Fig 3: Identifying Heat Shield Screws With Wiring Harness

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 4: Positioning Special Tool (33 0 110 And 23 4 050) On Workshop Lifter

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Support rear differential with prepared special tool 24 4 050.

Lash rear differential with tightening strap 33 5 206.

Fig 5: Identifying Special Tool (33 5 206)

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Disconnect plug connections (1) on rear differential.

Unfasten ground strap (2).

Fig 6: Disconnecting Plug Connections On Rear Differential

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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 .

Fig 7: Identifying Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Adhere to the installation sequence at the end of the document in order to prevent distortion of the rear differential 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.

Fig 8: Identifying Rear Bolt

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Risk of damage!

Inclination when the rear differential is being removed and installed 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.