24 00 033 Removing and installing automatic transmission (GA8HP45Z) (N20, N26)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2016 BMW 328i xDrive, 2016 BMW 328d xDrive, 2015 BMW 328i xDrive, 2015 BMW 328d xDrive, and 2014 BMW 328i xDrive. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

IMPORTANT: To avoid severe damage to the engine block, the protruding threads of the transmission bolts must be checked for corrosion and damage prior to removal.
If the threads are corroded, they must be derusted and cleaned prior to removal.
Renew rusted, damaged screws.

Non-observance leads to severe damage to the engine block and transmission.

IMPORTANT:

Do not let skin come in contact with transmission oil and do not inhale fuel vapors.
Wear protective gloves.
Ensure adequate ventilation.

IMPORTANT: After completion of repair work, check TRANSMISSION OIL LEVEL .
USE ONLY APPROVED TRANSMISSION OIL .
Failure to comply with this requirement will result in serious damage to the automatic transmission!

Necessary preliminary tasks:

Clamp off BATTERY .
Remove REINFORCEMENT PLATE .
Remove EXHAUST SYSTEM .
Remove heat shields.
Remove FRONT PROPELLER SHAFT .
Partially remove PROPELLER SHAFT .
- Disconnect propeller shaft at transmission.
- Release center mount.
- Tie up propeller shaft to underbody.
  NOTE: Bending the propeller shaft by an excessive angle can cause premature damage to the joint/propeller shaft!

Release screw (1).

Remove holder (2).

Fig 1: Identifying Holder Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Tightening torque 24 11 6AZ .

Remove the protective plate (2).

Fig 2: Identifying Protective Plate Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1) from ground strap (2).

Tightening torque 24 11 7AZ .

Fig 3: Identifying Ground Strap Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Version 1:

Unscrew nuts (1).

Tightening torque 18 20 1AZ .

Unfasten screws (2).

Tightening torque 18 20 2AZ .

Remove bracket (3) and catalytic converter (5).

Unscrew nuts (4).

Tightening torque 18 20 1AZ .

Fig 4: Identifying Catalytic Converter Bracket, Nuts, Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Remove rubber mounts for catalytic converter.

Version 2:

Unscrew nuts (1).

Tightening torque 18 20 1AZ .

Unfasten screws (2).

Tightening torque 18 20 2AZ .

Remove holder (3) for catalytic converter.

Fig 5: Identifying Holder Nuts And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1).

Disconnect hydraulic lines (2) to transmission oil cooler.

Tightening torque 17 22 1AZ .

Installation note:

Replace sealing rings.

Fig 6: Identifying Hydraulic Lines Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Tightening torque 24 00 1AZ .

Remove cover (2).

Fig 7: Identifying Cover Screws

Courtesy of BMW OF NORTH AMERICA, INC.

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 .

IMPORTANT: Replace all 6 bolts on torque converter.

Fig 8: Identifying Vibration Damper Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew knurled screw (1) from special tool 2 222 741 (do not remove completely) before inserting in the recess of the transmission housing.

Insert special tool 2 222 741 and shaped element (3) in the recess.

Slightly tighten knurled nut (2).

Screw in knurled screw (1) fully.

Locating pin (4) must be located between converter and engine.

Fig 9: Removing Knurled Screw
Courtesy of BMW OF NORTH AMERICA, INC.

Move special tool 2 222 741 in the recess until the locating pin (4) rests against the converter.

Use knurled nut (2) to fix special tool 2 222 741 and converter in position.

Supporting transmission:

Support transmission with special tools 23 4 050 , 00 2 030 .

Secure transmission to mounting with tensioning strap (1).

Tasks are described in TRANSMISSION BRACKET .

Fig 10: Supporting Transmission Using Special Tools (23 4 050/00 2 030)

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Tightening torque 22 32 3AZ .

Slacken nut (2).

Tightening torque 22 32 6AZ .

Release screw (3) and remove transmission cross-member (4).

Fig 11: Identifying Transmission Cross-Member, Screws And Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Unlock and disconnect connector (1) by turning.
Do not touch pins.
Release cable from brackets.
Insert special tool 24 2 390 in sealing cup.

Tasks are described in Gearbox holder.

NOTES ON MECHATRONICS

IMPORTANT: Read and comply with important note.

Fig 12: Disconnecting Connector

Courtesy of BMW OF NORTH AMERICA, INC.

Disconnect connector (1) from transfer box control unit (longitudinal torque module) (2).

Fig 13: Identifying Transfer Box Control Unit And Connector (Longitudinal Torque Module)

Courtesy of BMW OF NORTH AMERICA, INC.

Release wiring harness (1) from holder.

Fig 14: Identifying Holder Wiring Harness

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws.

Tightening torque 24 00 1AZ

Fig 15: Transmission Housing Bolts Tightening/Loosening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Check that fitting sleeves (1) are correctly seated.

Replace damaged fitting sleeves.

Fig 16: Identifying Fitting Sleeves

Courtesy of BMW OF NORTH AMERICA, INC.

Installation note:

Twist torque converter until bore hole in torque converter is flush with bore hole of flywheel.

Flange automatic transmission to engine.