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Home >> BMW >> 2021 >> 840i 2D Convertible >> Repair and Diagnosis >> External Pages >> Different car >> Section 217 (Automatic Transmission -- Repair (G02)) >> 24 00 Automatic Transmission Assembly >> 24 00 039 Removing and installing automatic transmission (X4 xDrive30i, X4 M40i 2019-2021) >> Removing the automatic transmission (all-wheel drive vehicle)

Removing the automatic transmission (all-wheel drive vehicle)

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Preliminary work 

CAUTION: Materials harmful to health. 
Contact with fluids harmful to health! 
  • Note and follow safety instructions on containers.
  • Conduct all work in appropriate personal protective equipment only.
NOTE: RISK OF DAMAGE 
Damage to the engine block. 
Serious damage to the engine block and transmission due to damaged and corroded screws. 
  • It is imperative that protruding threads of the transmission bolts are checked for corrosion and damage prior to removal.
  • It is imperative that all rust is removed from corroded threads and that they are cleaned prior to removal.
  • Replace rusted and damaged bolts.

Remove transmission crossmember 

G14205987Courtesy of BMW OF NORTH AMERICA, INC.

If installed: Releasing the transmission bearing support 

G14298965Courtesy of BMW OF NORTH AMERICA, INC.

Loosen ground strap from transmission 

G14206078Courtesy of BMW OF NORTH AMERICA, INC.

Disconnecting the connector from VTG control unit 

G14206079Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect hydraulic lines on the transmission 

G11105173Courtesy of BMW OF NORTH AMERICA, INC.

Removing the acoustic cover 

G11105169Courtesy of BMW OF NORTH AMERICA, INC.

Release converter bolt 

G11105174Courtesy of BMW OF NORTH AMERICA, INC.

Securing the torque converter 

G12702499Courtesy of BMW OF NORTH AMERICA, INC.

Disconnecting the connector from the sealing sleeve 

NOTE: TECHNICAL INFORMATION 
Notes on mechatronics are a fundamental requirement for these repair instructions and must be complied with at all times.
G11105171Courtesy of BMW OF NORTH AMERICA, INC.
G11105172Courtesy of BMW OF NORTH AMERICA, INC.

Notes on mechatronics 

CAUTION: Materials harmful to health. 
Contact with fluids harmful to health! 
  • Note and follow safety instructions on containers.
  • Conduct all work in appropriate personal protective equipment only.
NOTE: RISK OF DAMAGE 
Damage to the automatic transmission after removal of the mechatronics. 
Serious damage to the automatic transmission due to non-compliance with the following tasks: 
  • Load specific data status with the diagnostic system.
  • Use only approved transmission oil.
  • After completion of repair work, check the transmission oil level.
NOTE: RISK OF DAMAGE 
Electrostatic discharge. 
Damage to or destruction of electrical components. 
  • Leave the electrical components in their original packaging until they are being installed. Only use the original packaging for returning the product. Always package removed components straight away.
  • Read and comply with user information on using the associated special tool 12 7 060.
  • Only tap the housings of electrical components. Do not tap pins or multi-pin connectors directly.
  • Wear electrically conductive clothing and antistatic shoes (with ESD symbol).
  • For additional information see: NOTES ON ESD PROTECTION (ELECTRO STATIC DISCHARGE) .

Releasing the front prop shaft on the front axle transmission 

G14206072Courtesy of BMW OF NORTH AMERICA, INC.

Undo remaining Torx screws 

Fig 1: Transfer Box Screws Loosening Sequence
G14205999Courtesy of BMW OF NORTH AMERICA, INC.