24 00 112 Removing and installing the automatic transmission (GA8P75H) (N20 PHEV)

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.

WARNING:

High-voltage system - risk of serious injury or death.

The following points must be strictly observed prior to starting work:

De-energize the HIGH-VOLTAGE SYSTEM .
Observe SAFETY INFORMATION for handling hybrid cars.

IMPORTANT:

Avoid contact with transmission oil and inhalation of transmission oil vapors under all circumstances.
Wear protective gloves.
Ensure adequate ventilation

IMPORTANT: After completing work:
Adjusting the rotor position sensor is required.
Check TRANSMISSION OIL LEVEL .
Use only approved TRANSMISSION OIL .
Failure to comply with this requirement will result in serious damage to the automatic transmission!

NOTE: Observe notes on UNLOCKING AND DISCONNECTING different types of connectors in hybrid cars.

Necessary preliminary work:

De-energize the HIGH-VOLTAGE SYSTEM .
Clamp off BATTERY .
Remove EXHAUST SYSTEM .
Release MONITORING SENSOR on catalytic converter.
Partially remove PROPELLER SHAFT .
Disconnect propeller shaft at transmission.
Release center mount.
Tie up the propeller shaft to the vehicle underbody.
NOTE: Bending the propeller shaft by an excessive angle can cause premature damage to the joint/propeller shaft! Support engine with lifter when removing transmission.
Drain COOLANT .
Remove heat shields.

Removal:

Release screws (1).

Remove heat shield (2).

Fig 1: Identifying Heat Shield And Screws

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Release screws (1).

Release high-voltage cable (2) with holder from transmission.

Fig 2: Identifying High-Voltage Cable And Screws

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Release screws (1) from high-voltage connector.

Disconnect high-voltage connector (2) from the EME.

Fig 3: Identifying High-Voltage Connector And Screws

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Release screws (1).

Release holder (2) with high-voltage cable from transmission cross member.

Fig 4: Identifying Holder And Screws

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Release screws (1) from high-voltage connector (2).

Disconnect high-voltage connector (2) from the transmission.

Fig 5: Identifying High-Voltage Connector And Screws

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Release screws (1).

Release the holder (2) from the transmission.

Fig 6: Identifying Holder And Screws

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Remove front propeller shaft.

Push high-voltage cable (1) with the bracket to the right.

Feed out the cable and remove.

Fig 7: Pushing High-Voltage Cable

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Unscrew nuts (1).

Release rubber mount from holder (2).

Fig 8: Identifying Holder And Nuts

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Release screws (1).

Remove holder (2).

Fig 9: Identifying Holder And Screws

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Undo the transmission bolts (1).

Unscrew nuts (2).

Remove bracket (3).

Fig 10: Identifying Transmission Bolts, Bracket And Nuts

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Unlock and disconnect the connector (1).

Release cable from transmission.

Fig 11: Identifying Connector

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Release screw (1).

Release coolant lines (2) from transmission.

IMPORTANT: The coolant lines (2) are located on the transmission on the left under the bulkhead.

Keep to installation sequence.

Fig 12: Identifying Coolant Lines And Screw

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Unlock and disconnect temperature sensor connector (1).

IMPORTANT: Temperature sensor connector (1) is located on transmission on right beneath bulkhead.

Fig 13: Identifying Temperature Sensor Connector

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Release screw (1).

Disconnect hydraulic lines (2) to transmission oil cooler.

Keep to installation sequence.

Disconnect cable (3) from transmission.

Fig 14: Identifying Hydraulic Lines, Cable And Screw

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Release screw (1).

Detach cable clip (2) from gearbox.

Fig 15: Identifying Cable Clip And Screw

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Unlock and disconnect connector (1) by turning.
Do not touch pins.
Release cable from brackets.

Fig 16: Disconnecting Connector

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Operations are described in NOTES ON MECHATRONICS .

IMPORTANT: Read and comply with important note.

Insert special tool 24 2 390 in sealing cup (1).

Fig 17: Inserting Special Tool (24 2 390) In Sealing Cup

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Release Torx screw (1).

Fig 18: Identifying Torx Screw

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Slacken nut (1).

Remove ground strap (2).

Fig 19: Identifying Ground Strap And Nut

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Supporting transmission:

Support transmission with special tools 23 4 050, 2 219 012 .

Secure transmission to mounting with tensioning strap (1).

Repair work is are described in GEARBOX HOLDER .

After completion of work, check transmission fluid level.

Fig 20: Supporting Transmission With Special Tools (23 4 050) And (2 219 012)

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Loosen screws.

Lower transmission.

Fig 21: Locating Transmission Screws

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Unlock and disconnect rotor position sensor connector (1).

IMPORTANT: Rotor position sensor connector (1) is located on transmission.

Fig 22: Identifying Rotor Position Sensor Connector

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Release and detach connector (1) from transfer box control unit.

Remove bolt (2) and ground cable from transfer box.

Fig 23: Identifying Transfer Box Control Unit Connector And Bolt

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Undo the Torx screws.

Disconnect transmission.

Fig 24: Locating Transmission Torx Screws

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Installation:

Check that fitting sleeves (1) are correctly seated.

Replace damaged fitting sleeves.

Fig 25: Identifying Fitting Sleeves

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Transmission flange-mount.

Insert screws and tighten.

Fig 26: Locating Transmission Torx Screws

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Install the holder (3).

Insert Torx screws (1) and tighten.

Insert nuts (2) and tighten.

Fig 27: Identifying Transmission Bolts, Bracket And Nuts

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Insert Torx screw (1) and tighten.

Fig 28: Identifying Torx Screw

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Attach holder (2).

Insert screws (1) and tighten.

Fig 29: Identifying Holder And Screws

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Observe screw fastening sequence without fail.

Tightening torque 24 00 1AZ .

Fig 30: Transmission Screws Tightening Sequence

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Connect and lock rotor position sensor connector (1).

Fig 31: Identifying Rotor Position Sensor Connector

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Install cable clips (2).

Insert screw (1) and tighten.

Fig 32: Identifying Cable Clip And Screw

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Clip cable (3) to transmission.

Install hydraulic lines (2).

Insert screw (1) and tighten.

Parts: Replace sealing rings.

Tightening torque 17 22 1AZ .

Fig 33: Identifying Hydraulic Lines, Cable And Screw

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Remove special tool 24 2 390 .

Insert plug connector (1) and lock by turning.

Fig 34: Inserting Plug Connector

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Clip cable to the transmission.

Connect and lock the connector (1).

Fig 35: Identifying Connector

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Install holder (2).

Insert screws (1) and tighten.

Fig 36: Identifying Holder And Screws

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Attach rubber mount (2) on the holder.

Position nut (1) and tighten.

Tightening torque 18 31 3AZ .

Fig 37: Identifying Holder And Nuts

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Lock connector (1).

Install ground strap.

Fit nut (2) and tighten.

Tightening torque 24 11 7AZ .

Fig 38: Identifying Transfer Box Control Unit Connector And Bolt

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Insert screws and tighten.

Tightening torque 22 32 11AZ .

Fig 39: Locating Transmission Screws

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Install ground strap (2).

Position nut (1) and tighten.

Tightening torque 24 11 7AZ .

Fig 40: Identifying Ground Strap And Nut

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Remove special tool 23 4 050, 2 219 012 .

Fig 41: Supporting Transmission With Special Tools (23 4 050) And (2 219 012)

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Install high-voltage cable.

Place high-voltage cable (1) with the bracket to the left.

Fig 42: Locating High-Voltage Cable

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Connect high-voltage connector (2) to the transmission.

Insert screws (1) and tighten.

Tightening torque 12 36 1AZ .

Fig 43: Identifying High-Voltage Connector And Screws

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Connect high-voltage connector (2) to the EME.

Insert screws (1) and tighten.

Tightening torque 12 36 1AZ .

Fig 44: Identifying High-Voltage Connector And Screws

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Install holder (2) with the high-voltage cable to the transmission cross-member.

Insert screws (1) and tighten.

Tightening torque 12 36 2AZ .

Fig 45: Identifying Holder And Screws

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Connect high-voltage cable (2) with bracket to transmission.

Insert screws (1) and tighten.

Tightening torque 12 36 2AZ .

Fig 46: Identifying High-Voltage Cable And Screws

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Install heat shield (2).

Insert screws (1) and tighten.

Tightening torque 24 11 6AZ .

Fig 47: Identifying Heat Shield And Screws

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Connect and lock temperature sensor connector (1).

Fig 48: Identifying Temperature Sensor Connector

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Install coolant lines (2).

Insert screw (1) and tighten.

Parts: Replace sealing rings.

Tightening torque 17 22 6AZ .

Fig 49: Identifying Coolant Lines And Screw

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Required follow-up work:

Bleed the cooling circuit.

Connect BMW diagnosis system:

Service functions
Power train
Hybrid car
EME
Motor position sensor adjustment