24 00 034 Removing and installing automatic transmission (GA8HP70Z) N63 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 transmission oil vapors.
Wear protective gloves.
Ensure adequate ventilation

IMPORTANT: After completion of 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!

Necessary preliminary tasks

Clamp off battery . See 61 20 900 DISCONNECTING AND CONNECTING BATTERY NEGATIVE LEAD or 61 20... INFORMATION ON AGM BATTERY
Remove both INTAKE SILENCER HOUSINGS
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 EXHAUST SYSTEM
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

Release screw (2).

Disconnect cable (1).

Installation note:

Release screw (2).
Bring release lever (3) into contact with selector shaft by pressing slightly. Distance B=0 mm.
Adjust cable by means of holder until distance A=≥ 1 mm is obtained.
Tighten screw (2).

Fig 1: Identifying Screw, Cable And Lever
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Release screw (1).

Remove cover (2).

Tightening torque, 24 00 1AZ

Fig 2: Identifying Screws And Cover

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When unflanging the gearbox, pay attention to installation position of rubber connectors (1).

Fig 3: Identifying Rubber Connectors

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Release screw (1) and remove crankshaft sensor.

Disengage cable from holder (2).

Fig 4: Identifying Screw And Cable From Holder

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Release screw (1).

Undo hydraulic line and holder.

Fig 5: Identifying Hydraulic Line, Holder And Screw

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Release screw (1).

Disconnect hydraulic lines (2) to transmission oil cooler.

Installation note:

Replace sealing rings.

Keep to installation sequence.

Fig 6: Identifying Screw And Hydraulic Lines

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

Undo all 6 bolts on torque converter.

Tightening torque, 24 40 1AZ

Fig 7: Identifying Vibration Damper And Screw

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

Fig 8: 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 9: Inserting Special Tool (24 4 160) Into Recess Of Transmission Housing

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Screw on special tool 11 8 910 .

Tightening torque 31 10 1AZ .

Fig 10: 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:
N63 38 mm

Fig 11: Identifying Distance Between Cross Bar And Nuts

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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).

Repair work is are described in Gearbox holder. Refer to UNIVERSAL BMW TRANSMISSION TAKE-UP .

After completion of work, check transmission fluid level.

Fig 12: Securing Transmission To Mounting Tensioning Strap

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Release screws.

Remove transmission cross-member (1).

Tightening torque 22 32 3/4AZ .

Fig 13: 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 14: 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 cup.

Operations are described in:

NOTES ON MECHATRONICS

IMPORTANT: Read and comply with important note.

Fig 15: Disconnecting Connector

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Release screws.

Tightening torque 24 00 1AZ .

Unflange transmission.

Fig 16: Locating Transmission Screws

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Installation note:

Bore (1) in drive plate must be accessible from opening in transmission housing.

Check that fitting sleeves (2) are correctly fitted.

Replace damaged fitting sleeves.

Fig 17: Identifying Bore 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.