24 00 023 Removing And Installing Automatic Transmission (6HP26Z/6HP32Z)

WARNING: This page is about a different car, the 2008 BMW Alpina and 2007 BMW Alpina. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

00 0 200
00 2 030
24 1 110
24 2 390
24 4 131
24 4 132
24 4 160
24 4 161
24 4 162
24 4 163
24 5 301
24 5 306

IMPORTANT: After completion of work, check transmission oil level . See 00 11 500 CHECKING/TOPPING UP FLUID LEVEL IN AUTOMATIC TRANSMISSION (GA6HP26Z/6HP32Z) .
Use only the approved transmission fluid . See 3.0 APPROVED AUTOMATIC TRANSMISSION FLUIDS FOR INITIAL FILLINGS AND CORRECTING FLUID LEVELS .
Failure to comply with this requirement will result in serious damage to the automatic transmission!

Necessary preliminary tasks:

Disconnect battery . See 12 00 ... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY .
Remove heater bulkhead (except M57). See 51 71 085 REMOVING AND INSTALLING CENTER OF ASSEMBLY COMPARTMENT BULKHEAD .
Hold engine in transmission removal position.
- N73/M57: Position transmission lifter underneath.
- All others: with special tool 00 0 200
Remove exhaust system . See EXHAUST SYSTEM - REPAIR INSTRUCTIONS -- ALPINA .
- M57: after catalytic converter
- All others: complete
Remove oxygen monitor sensors (except M57). See 78 EMISSION CONTROL, OXYG .
Remove front engine underguard
Remove reinforcement plate . See 31 10 010 REMOVING AND INSTALLING/REPLACING REINFORCEMENT PLATE .
Installation:

Important notes on installation are described in this work step.

Release screws and remove transmission underbody protection (1).

Fig 1: Locating Screws

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Remove heat shields (1) and (2).

Fig 2: Identifying Heat Shields

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Only M57:

Release screws and remove underbody protection (1).

Fig 3: Identifying Underbody Protection

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Unfasten nut.

Remove cable (1).

Installation:

Adjust cable

Release nut
Adjust cable by means of holder (2)
Spacing A = 1 mm

Fig 4: Identifying Cable And Holder
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M67 only:

Release screws.
Remove holder.

Fig 5: Locating Holder Screws
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Release screw (1).

Pull hydraulic lines (2) to transmission fluid cooler out of transmission housing.

N73 only: Release holder for oil lines on engine.

Installation:

Replace sealing rings.

Fig 6: Identifying Hydraulic Lines And Screw

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BMW ALPINA B7 only

Pay attention to thermostat (2) when removing hydraulic lines (1)

Fig 7: Identifying Thermostat And Hydraulic Lines

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Crank engine at central bolt in direction of rotation until a torque converter retaining screw is visible in opening.

Release retaining screws with special tool 24 1 110 .

Crank engine further and release remaining 3 bolts.

Tightening torque. Refer to AUTOMATIC TRANSMISSION - TIGHTENING TORQUES .

Fig 8: Locating Retaining Screws

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Unlock plug (1) and disconnect (except M57).

Fig 9: Identifying Plug

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Unclip cable holder (1) from transmission housing (except M57).

Unclip cable from transmission.

Fig 10: Uncliping Cable Holder From Transmission Housing

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Perform following tasks:

Unlock and disconnect plug (1) by turning.
Insert special tool 24 2 390 in sealing sleeve.

The operations are described in Replacing mechatronics (Important: Read and comply with important note!). See 24 34 561 REPLACING MECHATRONICS (GA6HP26Z/6HP32Z) .

Fig 11: Disconnecting Plug

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Supporting transmission:

Support with special tools 24 5 306 , 24 5 301 and 00 2 03 0.

Set up special tool 24 5 306:

All supports to "B".
Supports 3 and 4 are at rear of transmission.
Support lettering points forwards.

Fig 12: Identifying Special Tools
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Securing torque converter against slipping out:

Install special tool 24 4 131 (basic unit) with corresponding blades in opening of transmission housing and clamp:

Blades for

M54, N62 24 4 132

Fig 13: Identifying Special Tools (24 4 131) And (24 4 132)
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Blades for

M67, M67TU 24 4 132 turned 180° screwed

Fig 14: Identifying Special Tools (24 4 132)
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Prepare special tool 24 4 161 (1) with corresponding shaped sections:

Shaped section for

2 N73 24 4 162
3 M57TU, M57T2 24 4 163

Fig 15: Identifying Special Tools
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Insert special tool 24 4 160 into opening of transmission housing and clamp gently with screw (1).

Twist in screw (2) and clamp down.

Then tighten down screw (1) briefly.

Fig 16: Identifying Special Tool (24 4 160)

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Further tasks:

Remove transmission cross-member . See 22 32 050 REPLACING CROSS-MEMBER FOR TRANSMISSION MOUNTING .

Tightening torque. Refer to AUTOMATIC TRANSMISSION - TIGHTENING TORQUES .

Fig 17: Identifying Transmission Cross-Member

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N73 only:

Release holder so that lines of power steering (1) do not collide with line from transmission oil cooler (2).

Fig 18: Identifying Lines Of Power Steering

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Remove propeller shaft:

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

If necessary, unlock or lock transmission lock.

NOTE: Support front of engine on housing with an assembly aid (e.g. transmission lifter) when removing and installing transmission.

Do not lower transmission too far, and take car to avoid collisions, e.g.:

M57: screws for catalytic converter.

Fig 19: Identifying Catalytic Converter Screws
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Unfasten screws.

Tightening torque. Refer to AUTOMATIC TRANSMISSION - TIGHTENING TORQUES .

Fig 20: Locating Screws

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Installation:

Check that dowel sleeves are correctly seated.

Replace damaged dowel sleeves.

Fig 21: Identifying Dowel Sleeves

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Installation:

Bore (1) in driving disk must be accessible from opening on engine oil pan.

Fig 22: Identifying Bore In Driving Disk

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Installation:

Rotate torque converter until bore in torque converter is flush with bore in driving disk.

Flange automatic transmission to engine.