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Home >> BMW >> 2021 >> 840i xDrive 2D Convertible >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission -- Repair (G14, G15, & G16) >> 24 00 Automatic Transmission Assembly >> 24 00 240 Removing and installing automatic transmission (840i Convertible) >> Installing the automatic transmission (GA8HP51Z)

Installing the automatic transmission (GA8HP51Z)

NOTE: RISK OF DAMAGE 
Damage to the transmission  .
Damage to the transmission due to unapproved transmission oil  .
  • Use only the approved transmission oil.
  • Check the transmission oil level after completing the repair.
NOTE: TECHNICAL INFORMATION 
After completion of the work, program the control unit for the electronic gearbox control (EGS).

Checking installation position of torque converter 

NOTE: RISK OF DAMAGE 
Damage to the automatic transmission/impeller  .
When disconnecting the engine and transmission, the torque converter can become loose! Failure to observe the correct installation positions of the torque converter may lead to damage to the impeller driver  .
  • Make sure that the torque converter is in the correct installation position before installing the automatic transmission.
G09922078Courtesy of BMW OF NORTH AMERICA, INC.

See repair instructions:

NOTE: RISK OF DAMAGE 
Damage of the flywheel and automatic transmission  .
A non-horizontal fit during the removal and installation of the automatic transmission can lead to damage on the automatic transmission or flywheel  .
  • Align the automatic transmission completely horizontal to the engine during the removal and installation.
  • Check for correct alignment before tightening the transmission bolts.
G14193124Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUES SPECIFICATION

Torque converter to flywheel
M10
Replace screws.
tightening torque  56 Nm
G11105174Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUES SPECIFICATION

Catalytic converter to holder
M8 Nut
Replace nut.
Tightening torque  19 Nm
G12731094Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUES SPECIFICATION

Transmission to engine
M8 Tightening torque  19 Nm
M12 Tightening torque  66 Nm
Fig 1: Transmission Flange-Mount Nuts Tightening Sequence
G14228313Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUES SPECIFICATION

Transmission oil line to transmission
M6x25
Replace the sealing ring.
tightening torque  8 Nm
G14214708Courtesy of BMW OF NORTH AMERICA, INC.
TIGHTENING TORQUES SPECIFICATION

Ground strap to transmission or body
M8 tightening torque  19 Nm
G14193104Courtesy of BMW OF NORTH AMERICA, INC.
G14228294Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work