33 11 021 Replacing radial shaft seal for drive flange on rear axle final drive

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Special tools required:

23 0 020
11 8 310
00 5 010
2 298 610
00 5 500
33 3 480
33 3 490

IMPORTANT: Use only approved gearbox oils. See OPERATING FLUIDS .
Failure to comply with this instruction will result in serious damage to the rear axle final drive!

Necessary preliminary tasks:

Remove EXHAUST SYSTEM .
Remove heat shields.
Partially remove PROPELLER SHAFT .
- Disconnect propeller shaft at rear axle differential.
- Release center mount.
- Tie up propeller shaft to underbody.
  IMPORTANT: Bending the propeller shaft by an excessive angle can cause premature damage to the joint/propeller shaft!

Lift out lockplate (1).

Installation note:

Renew lockplate (1).

Mark position of collar nut (2) on drive shaft with center punch.

Fig 1: Identifying Drive Shaft Collar Nut And Lockplate

G09926994

Courtesy of BMW OF NORTH AMERICA, INC.

Counter support drive flange with special tool 23 0 020 .

Unscrew collar nut.

Fig 2: Supporting Drive Flange Using Special Tool (23 0 020)

G09926995

Courtesy of BMW OF NORTH AMERICA, INC.

Release flange with special tool 11 8 310.

Fig 3: Releasing Flange Using Special Tool (11 8 310)

G09926996

Courtesy of BMW OF NORTH AMERICA, INC.

Pull out radial shaft seal with special tool 00 5 010 .

Fig 4: Pulling Radial Shaft Seal Using Special Tool (00 5 010)

G09926997

Courtesy of BMW OF NORTH AMERICA, INC.

Coat sealing lips of new radial shaft seal and sealing surface of bevel pinion with final drive oil.

Drive in radial shaft seal with special tool 2 298 610 .

Fig 5: Installing Radial Shaft Seal Using Special Tool (2 298 610)

G09926998

Courtesy of BMW OF NORTH AMERICA, INC.

Clean drive flange and connect.

If necessary, carefully strike drive flange with plastic hammer until collar nut can be fitted in position.

Tighten down collar nut (2) to point where marker points are aligned.

IMPORTANT: Do not tighten collar nut beyond the marker points under any conditions, as this would damage the clamping sleeve and the rear axle differential would have to be renewed.

Fig 6: Identifying Drive Shaft Collar Nut And Lockplate

G09926994

Courtesy of BMW OF NORTH AMERICA, INC.

Knock in new lockplate (1) with special tool 00 5 500 and 33 3 480 or 33 3 490.

After installation:

Check FINAL DRIVE OIL LEVEL , correct if necessary.