23 00 018 Removing and installing transmission (GS6-53DZ) N54 AWD

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 BMW 535xi, 2010 BMW 535i, 2009 BMW 535xi, 2009 BMW 535i, and 2008 BMW 535xi. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

IMPORTANT: After completion of work, check gear oil level.
Use only the approved gear oil.

Failure to comply with this requirement will result in serious damage to the manual transmission.

IMPORTANT: Aluminium screws/bolts must be replaced each time they are released .
Aluminium screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminium screws/bolts are not magnetic .
Jointing torque and angle of rotation must be observed without fail (risk of damage) .

Necessary preliminary tasks:

Disconnect battery
Remove REINFORCEMENT PLATE
Remove EXHAUST SYSTEM
Remove FRONT PROPELLER SHAFT
Support engine with lifter

Remove heat shields (1) and (2).

Fig 1: Identifying Heat Shields

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Release screws (1).

Disconnect connector (2).

Steel screws, tightening torque 23 00 1AZ .

Aluminium screws, tightening torque 23 00 2AZ .

Release aluminium screws with special tool 00 9 010.

Fig 2: Identifying Connector

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Unclip cable (1) from holder.

Release screw (2) and remove holder (3).

NOTE: Illustration similar

Fig 3: Identifying Holder Screw And Cable

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Release screws (1).

Remove holder (2).

Fig 4: Identifying Holder Screws

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Disconnect plug connection (1) from reversing light switch.

Release cable from retainers.

Fig 5: Identifying Plug Connection

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Fig 6: Identifying Reversing Light Switch

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Remove propeller shaft from transmission.
Release center bearing.
Tie propeller shaft to one side.

Tasks are described in PROPELLER SHAFT .

Supporting transmission:

Support transmission with special tools 23 4 050, 00 2 030.

Secure transmission to mounting with tensioning strap (1).

After completion of work, check transmission oil level.

Fig 7: Supporting Transmission With Special Tools 23 4 050 And 00 2 030

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Remove CROSS-MEMBER FOR TRANSMISSION MOUNTING (AWD) .

NOTE: Pressure line of clutch slave cylinder remains connected.

IMPORTANT: Slowly relieve tension on clutch slave cylinder otherwise air is drawn in through sealing sleeve.

Release nuts and remove clutch slave cylinder.

Tightening torque 21 52 5AZ .

Fig 8: Locating Clutch Slave Cylinder Nuts

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Lever out retainer (1).

Disengage shift rod (2).

Installation:

Grease shift rod.

Make sure shims (3) are in correct position.

Fig 9: Disengaging Shift Rod

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Release and remove bearing pins (1) in direction of arrow.

Fig 10: Removing Bearing Pins

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Lift out shift arm (1).

Installation:

Grease bearing pins (1).

Fig 11: Lifting Out Shift Arm

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Release screws.

Installation:

Tightening torque, steel screws 23 00 1AZ .

Tightening torque, aluminium screws 23 00 2AZ .

Screws: 3/4/5/9/10 (screw 3 only present on N54).

IMPORTANT: Do not allow the transmission to hang off from the transmission input shaft as this will deform the clutch plate. Pull out transmission towards rear and remove.

Fig 12: Transmission Housing Bolts Tightening/Loosening Sequence

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Installation:

Secure angle of rotation special tool 00 9 120 with magnet 00 9 130 to floor plate. Screw down aluminium screws/bolts according to angle of rotation. Angle of rotation 23 00 2AZ.

Fig 13: Identifying Special Tool 00 9 120 And Magnet 00 9 130

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Installation:

Check that dowel sleeves are correctly seated.

Replace damaged dowel sleeves.

Ensure correct position of cover plate.

Fig 14: Identifying Dowel Sleeves

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Installation:

Check lubrication of transmission input shaft for sticky consistency. If grease is sticky, clean input shaft and replace clutch plate .

Check clutch plate for friction rust in splines and replace if necessary.

Mechanically remove existing grease and lining abrasion from splines of clutch plate (with a cloth).

Fig 15: Identifying Transmission Input Shaft

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Installation:

Greasing specification:

Remove and clean release bearing and release lever .
Push on grease scraper ring 21 2 240 as far as it will go.
Grease splines (1) of input shaft with a brush.
Detach grease scraper ring.
Lightly grease guide sleeve for release bearing.

Fig 16: Identifying Splines Of Input Shaft
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