26 11 000 Removing and installing output shaft (inserted) completely

Special tools required:

IMPORTANT: On four-wheel drive vehicles with defective, non-engaging drive, it is imperative that the following information is taken account of.

Additional work when replacing the propeller shaft.

IMPORTANT: Replacement of the sunk nut on the rear axle final drive is absolutely required!
The sunk nut already has a screw locking.
After the propeller shaft has been screwed into the rear axle final drive (sunk nut), a hardening time of at least 2 hours is absolutely necessary.
The hardening time may be extended at lower temperatures!
Failure to comply with these instructions may cause serious damage!

Necessary preliminary tasks:

Remove complete exhaust system . See 18 00 020 REMOVING AND INSTALLING COMPLETE EXHAUST SYSTEM (N54) or 18 00 020 REMOVING AND INSTALLING COMPLETE EXHAUST SYSTEM (N55) .
Remove underbody protection with holders.
Remove heat shields.

IMPORTANT: Adhere without fail to the installation and bolt-tightening sequence.
installation sequence:

Join propeller shaft to transmission
Join propeller shaft to rear axle final drive
Join center mount

Screw-fastening sequence:

Insert nut
Flexible disc to transmission
Center mount

IMPORTANT: To avoid buzzing sound after refitting the propeller shaft:

The flexible disc connection (1) on the front at the propeller shaft must be marked in one plane with the flexible disc (2) and the three-bolt flange (3) before removal.
During installation the three-bolt flange (3) must be forced back together again with the flexible disc (2) in the same position.

Fig 1: Identifying Flexible Disc Connection And Bolt Flange
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Replace ZNS bolts and self-locking nuts.

Release screws.

Installation note:

Replace ZNS bolts and self-locking nuts.
Grip mounting bolts of flexible disc at nuts and tighten down by way of bolts.

Fig 2: Locating ZNS Bolts
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Installation note:

Check centering mount.

If necessary, replace damaged CENTERING .

Grease centering mount.

Grease: high temperature resistant, long-term grease

Fig 3: Locating Centering Mount
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Installation note:

Tighten down screws/bolts to specified torque.

Secure angle of rotation special tool 00 9 120 with magnets 00 9 130 to vehicle underbody and screw down further according to angle of rotation.

Tightening torque 26 11 1AZ .

Fig 4: Identifying Vehicle Underbody And Screw Angle

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Slacken screws (1)

Tightening torque 26 11 6AZ

Using a suitable tool (2), secure output shaft at center universal joint against turning.

Remove screws of center mount fully only after opening insert nut.

IMPORTANT: The center mount of the propeller shaft in E9x M3 can be installed in two directions. The "TOP" label on the center mount must be face the body.

Fig 5: Removing Screws Of Center Mount

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IMPORTANT: The bi-hexagonal flange nut must not be used for bracing.

Failure to comply with this instruction may result in serious damage to the rear axle final drive.

IMPORTANT: The sunk nut must be opened against direction of travel in clockwise direction.

Fig 6: Inserting Collar Of Flange Nut

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If an attempt is made to open the sunk nut in direction of travel in clockwise direction, the sunk nut is automatically screwed in further and the insert collar of the 12-edge flange nut is severely damaged.

If the insert collar of the flange nut was damaged, the propeller shaft can no longer be secured using a new sunk nut and the rear axle differential must be replaced.

Release insert nut against direction of travel in clockwise direction with special tools 33 5 040 and 33 5 070 .

Tightening torque 26 11 1AZ .

Remove retaining clip (1) and gasket (2).

Installation note:

Retaining clip and gasket must be replaced.

Fig 7: Identifying Retaining Clip And Gasket

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Remove insert nut (1).

Installation note:

Insert nut must be replaced.

Fig 8: Identifying Propeller Shaft Nut

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Before installing propeller shaft:

Clean insert collar (1) on flange nut and gearing on bevel pinion (2).

Fill insert collar (1) with grease.

Grease: high temperature resistant, long-term grease

Fig 9: Identifying Collar And Bevel Pinion

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Clean thread (1) of joint hub to remove adhesive residues.

Clean hub teeth (2), then coat with grease.

Grease: high temperature resistant, long-term grease

IMPORTANT: Thread of joint hub must not be fouled with grease.

Fig 10: Identifying Thread And Hub Teeth

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Place flange nut (1) with gasket in insert collar of flange nut.

Install retaining clip (2).

Fig 11: Identifying Flange Nut And Retaining Clip

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IMPORTANT: Adhere without fail to the installation and bolt-tightening sequence.
installation sequence:

Join propeller shaft to transmission
Join propeller shaft to rear axle final drive
Join center mount

Screw-fastening sequence:

Insert nut
Flexible disc to transmission
Center mount

Slide propeller shaft (1) to the limit position onto insert nut and secure.

Secure output shaft at center universal joint against turning with a mounting lever.

IMPORTANT: The bi-hexagonal flange nut (2) must not be used for bracing.

Failure to comply with this instruction may result in serious damage to the rear axle final drive.

Fig 12: Identifying Propeller Shaft And Flange Nut

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Insert nut must be screwed into place within 5 minutes .

Tightening torque 26 11 1AZ .