24 00 033 Removing and installing automatic transmission (GA8HP45Z) N55 AWD

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Special tools required:

IMPORTANT: To prevent heavy damage to the engine block, the protruding thread of the transmission bolts absolutely must be checked for damage and corrosion before removal .
If there are signs of corrosion, the rust must be removed and the threads must be cleaned before removal .
Replace rusted, damaged screws.

Failure to comply with this instruction will result in serious damage to the engine block and transmission.

IMPORTANT:

Do not let skin come in contact with transmission oil and do not inhale fuel vapors.
Wear protective gloves.
Ensure adequate ventilation.

IMPORTANT: After completion of repair work, check transmission oil level. Refer to CHECKING TRANSMISSION FLUID LEVEL .
Use only the approved transmission oil. Refer to 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!

IMPORTANT: For vehicles with N54/N55 engine up to production date 09/2012, aluminum bolts for the for the securing of the transmission are also installed.
As of production date 09/2012, only steel bolts are installed for the securing of the transmission.

NOTE: Aluminum screws/bolts must be replaced each time they are released .
Aluminum screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminum screws/bolts are not magnetic .
Jointing torque and angle of rotation must be observed without fail (risk of damage) .
The aluminum bolts can be optionally replaced by steel bolts.

Necessary preliminary tasks

Disconnect the battery . See 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD or 61 20... INFORMATION ON AGM BATTERY
Remove FAN COWL
Remove underbody protection . See 51 47 490 REMOVING AND INSTALLING/REPLACING UNDERBODY PROTECTION (FRONT) or 51 47 491 REMOVING AND INSTALLING/REPLACING REAR UNDERBODY PROTECTION at front and rear
Remove REINFORCEMENT PLATE Important installation notes are described in this job item
Remove both hose connectors on the charge air cooler on the left and right.
Remove EXHAUST SYSTEM
Remove heat shields
Release MONITORING SENSOR on catalytic converter
Remove FRONT PROPELLER SHAFT
Detach PROPELLER SHAFT at transfer box, release center mount
Tie back propeller shaft to underbody
Note:
Bending the propeller shaft by an excessive angle can cause premature damage to the joint/propeller shaft!
Support engine with jack when removing gearbox

Remove upper part of cable duct (1).

Fig 1: Identifying Upper Part Of Cable Duct

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Release cable (1) from holder (2).

Release screw (3).

Remove cover (4).

Tightening torque 24 00 2AZ .

Fig 2: Identifying Cable, Holder, Screw And Cover

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Check installed bracket position (1).

Fig 3: Identifying Bracket Position

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Release screws (1).

Slacken nut (2).

Remove bracket (3).

Tightening torque 18 20 1AZ .

Fig 4: Identifying Screws, Slacken Nut And Bracket

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Release screw (1).

Disconnect hydraulic lines (2) to transmission oil cooler.

Tightening torque 17 22 1AZ .

Installation note:

Replace sealing rings.

Fig 5: Identifying Screw And Hydraulic Lines

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IMPORTANT: Keep to installation sequence.
Failure to observe this sequence will result in leaks.

1. Lower hydraulic line.
2. Upper hydraulic line.

Crank engine at vibration damper in direction of rotation until screw (1) is visible in recess.

Release all 6 bolts of torque converter with special tool 24 1 110 .

Installation note:

Replace converter screws. Remove any remaining adhesive residue from the thread.

Fig 6: Identifying Vibration Damper And Screw

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Tightening torque 24 40 1AZ .

Prepare special tool (1) 24 4 161 (A) with shaped element (2) 24 4 166 as pictured.

Fig 7: Preparing Special Tool (24 4 161)

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Insert special tool 24 4 160 into recess of transmission housing and clamp gently with screw (1).

Raise by turning screw (2) and clamp down.

Then tighten down screw (1).

Fig 8: Inserting Special Tool (24 4 160) Into Transmission Housing

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Supporting transmission

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

Secure transmission to mounting with tensioning strap (1).

Tasks are described in Gearbox holder. Refer to UNIVERSAL BMW TRANSMISSION TAKE-UP .

After completion of work, check transmission fluid level.

Fig 9: Securing Transmission To Mounting Tensioning Strap

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Release screw (1) on left and right of axle.

Remove cover plate (2) on left and right of axle.

Remove bolt (3) on left and right of axle.

Tightening torque 31 10 1AZ .

Fig 10: Identifying Screw, Cover Plate And Bolt

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Screw on special tool 11 8 910 .

Fig 11: Identifying Special Tool (11 8 910)

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Adjust distance (1) between cross bar and facing using nuts (2).

Nuts (2) must be screwed down in opposite direction after distance has been adjusted.

IMPORTANT: Distance:
N55 38.5 mm

Fig 12: Identifying Distance Between Cross Bar And Nut

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Undo bolts (1) for gearbox mount.

Tightening torque 22 32 10AZ .

Fig 13: Identifying Gearbox Mount Bolts

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Release screws.

Remove transmission cross-member (1).

Tightening torque 22 32 3/4AZ .

Fig 14: Locating Transmission Cross-Member And Screws

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Unplug connector (1) from transfer box control unit (longitudinal torque module).

Release screw (2).

Remove earth strap (3).

Fig 15: Identifying Connector, Screw And Earth Strap

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Unlock and disconnect connector (1) by turning.
Do not touch pins.
Release cable from brackets.
Insert special tool 24 2 390 in sealing sleeve.

Repair work is described in

NOTES ON MECHATRONICS

IMPORTANT: Read and comply with important note.

Fig 16: Disconnecting Connector

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Release screws.

Installation note:

Observe screw fastening sequence without fail.

Tightening torque, steel screws 24 00 1AZ .

Aluminum screws must be replaced.

Tightening torque and angle of rotation, aluminum screws/bolts 24 00 2AZ (7, 8, 9, 10, 11).

Fig 17: Transmission Housing Bolts Tightening/Loosening Sequence

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Installation note:

Tighten down screws/bolts to specified torque.

Attach special tool 00 9 120 for angle of rotation with magnet 00 9 130 to vehicle underbody and screw down blue aluminum screws/bolts in accordance with angle of rotation.

Angle of rotation 24 00 2AZ .

Fig 18: Attaching Special Tool (00 9 120) For Angle Of Magnet

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Installation note:

Bore hole (1) of drive plate must be accessible from recess on engine oil sump.

Check fitting sleeves (2...3) for correct seating.

Replace damaged fitting sleeves.

NOTE: Graphic representation similar.

Fig 19: Identifying Bore Hole And Sleeves

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Installation note:

Rotate torque converter until bore hole in torque converter is flush with bore hole in drive plate.

Flange automatic transmission to engine.