33 10 010 Removing and installing/replacing rear differential

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Special tools required:

WARNING: Danger of injury!
Rear axle differential must be lashed with tensioning strap 33 5 206 to prevent it from dropping down when pressing the output shafts off.

IMPORTANT: When removing/reinstalling the rear axle final drive, both OUTPUT SHAFT RADIAL SHAFT SEALS and the circlip on both output shafts must be replaced.
After completing repair work, CHECK GEARBOX OIL LEVEL .

Necessary preliminary work:

Remove PROPELLER SHAFT ON REAR AXLE FINAL DRIVE .
- Disconnect propeller shaft at rear axle differential.
- Release center mount.
- Tie up propeller shaft to underbody.
  NOTE: Bending the propeller shaft by an excessive angle can cause premature damage to the joint/propeller shaft!

Position special tool 33 5 200 on workshop jack.

Support rear axle final drive 33 5 200 with special tool.

Lash rear axle final drive with tensioning strap 33 5 206 to special tool 33 5 200 .

IMPORTANT: Tensioning strap 33 5 206 must be pass through between output shafts and rear axle final drive cover!

Fig 1: Positioning Special Tool (33 5 200) On Workshop Jack

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IMPORTANT: Special tools 33 5 120 and 33 5 125 must be inserted in all-round slot (1) on output shaft!

Fig 2: Identifying Round Slot On Output Shaft

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Press only left output shaft out of rear axle final drive with jerking and jolting motions using special tool 33 5 123 , 33 5 121 , 33 5 124 /33 5 126 .

Here, synchronising key of bolt 33 5 122 must rest on rear axle final drive.

Fig 3: Identifying Special Tool (33 5 123)

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Release screws (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.

Fig 4: Identifying Screws

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Slacken nut (1).

Tightening torque 33 17 2AZ .

N47 only: Remove vibration absorber (2) with holder.

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.

Fig 5: Identifying Vibration Absorber With Holder, Nut

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Lower rear axle final drive with special tool 33 5 200 .

Fig 6: Identifying Lower Rear Axle Final Drive With Special Tool (33 5 200)

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Press (tilt) rear axle final drive on right upwards.

Feed out left output shaft in downward direction and tie up.

Swing rear axle final drive towards left side.

Fig 7: Identifying Rear Axle Final Drive

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Press right output shaft out of rear axle final drive with jerking and jolting motions using special tool 33 5 123 , 33 5 121 , 33 5 124 /33 5 126 . Here, synchronising key of bolt 33 5 122 must rest on rear axle final drive.

Feed out output shaft and tie up.

Remove rear axle final drive.

Fig 8: Removing Rear Axle Final Drive

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IMPORTANT: High installation forces indicate that the output shaft spline teeth are damaged or deformed!

Check gearing and replace components if damaged.

Check dust plate (1) for damage, renew if necessary.

Circlip (2) must be replaced.

Coat highlighted contact surface (3) of output shaft with approved final drive oil. See REAR AXLE - OPERATING FLUIDS .

Fig 9: Identifying Dust Plate, Circlip And Contact Surface

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Installation note:

Insert output shaft into rear axle final drive.

Pull out assembly protection ring at lug (1) until one of the two predetermined breaking points gives.

Fig 10: Identifying Protection Ring At Lug

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Drive output shaft into rear axle final drive using special tool 33 5 125 33 5 127 and a rubber mallet.

Fig 11: Removing Output Shaft

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Assembly sequence:

Install rear axle final drive with workshop jack and special tool 33 5 200 in rear axle support
Insert bolts (1) (do not tighten down)
Insert bolt from rear and replace nut (2) (do not tighten down)
Release tensioning strap, lower special tool 33 5 200 and move away
Tighten down screws (1)
Tightening torque 33 17 1AZ .
Tighten nut (2)
Tightening torque 33 17 2AZ .

Fig 12: Identifying Rear Axle Support Screws And Nut
Courtesy of BMW OF NORTH AMERICA, INC.

After installation:

Check TRANSMISSION OIL LEVEL , correct if necessary.