23 00 019 Removing and installing transmission (GS6-37BZ) AWD N51/N52/N52K

WARNING: This page does not describe the selected car, but rather 14 other vehicles, including the 2013 BMW 328xi, 2013 BMW 328i, 2012 BMW 328xi, 2012 BMW 328i, and 2011 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

00 2 030
00 9 120
00 9 130
21 2 221
23 0 132
23 4 050

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-magnesium materials.

No steel screws/bolts may be used due to the threat of electrochemical corrosion.

A magnesium crankcase requires aluminium screws/bolts exclusively.

Aluminium screws/bolts must be replaced each time they are released.

The end faces of these screws/bolts are painted blue for the purposes of reliable identification.

Jointing torque and angle of rotation must be observed without fail (risk of damage ).

Necessary preliminary tasks:

Remove underbody protection at front and rear with brackets.
Remove front underbody protection.
Remove rear underbody protection (with brackets).
Remove complete exhaust system
Remove heat shields
Support engine with lifter when removing transmission

Release screws (1).

Remove exhaust system bracket (2).

For tightening torque refer to 23 71 4AZ in 23 71 TRANSMISSION MOUNTS .

NOTE: Illustration similar

Fig 1: Exhaust System Bracket And Mounting Screws

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Detach plug (1) from reversing light switch.

Release cable from retainers.

Fig 2: Reversing Light Switch Plug

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Unclip cable (1) from holder.

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

Fig 3: Cable, Screw And Holder

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Release aluminium screw on right next to cable retaining plate with special tool 00 9 010.

Installation:

Aluminium screws must be replaced.

For tightening torque refer to 23 00 2AZ in 00 COMPLETE TRANSMISSION .

Fig 4: Special Tools (00 9 010)

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Disconnect connector (1).

Unfasten screws.

Unscrew holder (2).

For tightening torque refer to 23 00 1AZ in 00 COMPLETE TRANSMISSION .

Fig 5: Screws, Holder And Connector

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Supporting transmission:

Support transmission with special tools 23 4 050, 23 0 132 and 00 2 030.

Secure transmission with tensioning strap (1).

Tasks are described in Transmission bracket.

After completion of work, check transmission oil level.

Fig 6: Tensioning Strap, Special Tools (23 4 050), (23 0 132) And (00 2 030)

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

Tasks are described in Removing propeller shaft.

NOTE: When removing and installing the transmission, support the front end of the engine at the housing with an installation aid (e.g. transmission lifter).

Remove screws and nuts.

Remove cross-member.

For tightening torque refer to 23 71 1AZ/ 2AZ in 23 71 TRANSMISSION MOUNTS

Fig 7: Cross-Member, Screws And Nuts

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Lever out retainer (1).

Disengage shift rod (2).

Installation:

Grease shift rod.

Grease,

Refer to BMW Service Operating Fluids.

Make sure shims (3) are in correct position.

Fig 8: Retainer, Shims, Shift Rod And Removal Direction

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

Fig 9: Bearing Pins And Removal Directions

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Lift out shift arm (1).

Installation:

Grease bearing pins (1).

Grease,

Refer to BMW Service Operating Fluids.

Fig 10: Shim Arm, Bearing Pins And Removal Direction

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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.

For tightening torque refer to 21 52 5AZ in 21 52 CLUTCH OPERATION (HYDRAULIC) .

Fig 11: Pressure Line Mounting Nuts

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Release screws.

Installation:

Observe screw fastening sequence without fail.

For tightening torque refer to steel 23 00 1AZ in 00 COMPLETE TRANSMISSION .

Aluminium screws/bolts must be replaced.

For tightening torque and angle of rotation refer to

Aluminium screws/bolts 23 00 2AZ in 00 COMPLETE TRANSMISSION .

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:

Tighten down screws/bolts to specified torque.

Secure angle of rotation special tool 00 9 120 with magnet 00 9 130 to floor plate.

Screw down blue aluminium screws/bolts in accordance with angle of rotation.

For angle of rotation refer to 23 00 2AZ in 00 COMPLETE TRANSMISSION .

Fig 13: Special Tool (00 9 120) And (00 9 130)

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Installation:

Check dowel sleeves (1 and 2) for correct seating.

Replace damaged dowel sleeves.

Ensure correct position of cover plate.

Fig 14: 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: Transmission Input Shaft Lubrication Area

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Installation:

Greasing specification:

Remove and clean release bearing and release lever.
Push on grease scraper ring 21 2 221 as far as it will go.
Grease teeth (1) of input shaft. Refer to BMW Service Operating Fluids.
Detach grease scraper ring.

Fig 16: Transmission Input Shaft Teeth, Special Tools (21 2 240) And (21 2 221)
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