Preparing the replacement transmission

NOTE: DANGER
High-voltage system.
The high-voltage system operates on the basis of hazardous, electrical voltage and high currents. Mortal hazard through electric shock!

All work on the high-voltage system may only be carried out by specially trained and technically experienced personnel.
For additional information see: 61 00... SAFETY INSTRUCTIONS on handling hybrid cars
For additional information see: 61 25... NOTES on repair of high-voltage battery unit

NOTE: TECHNICAL INFORMATION
With the ignition off and the high-voltage safety plug disconnected, the Check Control message "High voltage system faulty" is displayed by default.
The message "High-voltage system switched off" (absence of voltage) is only displayed when the ignition is switched on.

NOTE: TECHNICAL INFORMATION
Run the "rotor position sensor calibration" with the diagnosis system after installing the exchange transmission.

Preliminary work

Disconnect all battery GROUND LEADS
If the active stabilizer is installed: remove fan COWL .
Remove rear UNDERBODY PROTECTION .
Remove the transmission side UNDERBODY PLANKING
Remove the tunnel connecting SUPPORT
Remove the rear axle COVER .
If installed: remove the right and left TORSION STRUT where required.
Remove complete EXHAUST SYSTEM .
Remove the HEAT SHIELDS .
Remove the RETAINING PLATES
Remove transmission CROSS-MEMBER .
Partially loosen the PROP SHAFT
Release the front axle transmission front PROP SHAFT .
Remove AUTOMATIC TRANSMISSION (all-wheel drive vehicle) (GA8HP75HZ).

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 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
Replacement transmissions come filled with oil

NOTE: TECHNICAL INFORMATION
Collect and dispose of emerging fluids. Observe country-specific waste disposal regulations.

NOTE: TECHNICAL INFORMATION
After completion of the work, program the control unit for the electronic gearbox control (EGS).

NOTE: TECHNICAL INFORMATION
When installing a new or replacement transmission, flush the transmission oil cooler and lines.
For ADDITIONAL INFORMATION see: Flushing 17 21 500 transmission oil cooler and lines (automatic transmission)

Replace clamps (arrows) of sound insulation on the right.
Parts: Clamps
Remount the sound insulation on the right.

Courtesy of BMW OF NORTH AMERICA, INC.
Replace clamps (arrows) of sound insulation on the left.
Parts: Clamps
Remount the sound insulation on the left.
NOTE: TECHNICAL INFORMATION
After disassembling the transportation retainer, secure the torque converter against slipping out.

Courtesy of BMW OF NORTH AMERICA, INC.
Disassemble transportation retainers.
Remount all cable clips.
Remount all seal plugs.
Remount protective cap on output shaft.
Remount exhaust bracket.
Remount transmission mounting bracket.
If installed: Remount transfer box.
Make note of transmission identification (see BMW Group parts/catalog sales and nameplate).

Follow-up work

Install the AUTOMATIC TRANSMISSION (all-wheel drive vehicle) (GA8HP75HZ).
Install the front axle transmission front PROPELLER SHAFT .
Fasten the (partially removed) PROP SHAFT
Install transmission CROSS MEMBER .
Install the RETAINING PLATES .
Install the HEAT SHIELDS .
Install the complete EXHAUST SYSTEM .
If installed: install the right and left TORSION STRUT where required.
Install the rear axle COVER .
Install the tunnel connecting SUPPORTS
Reconnect all battery GROUND LEADS .
Check/top up the automatic transmission OIL LEVEL .
Perform rotor position senor CALIBRATION .
SERVICE FUNCTION and replacement transmission (plug-in hybrid electric vehicle).
If the active stabilizer is installed: install fan COWL .
Install the transmission side UNDERBODY PLANKING .
Install rear UNDERBODY PROTECTION .
ENCODE/PROGRAM control unit(s)