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Home >> BMW >> 2015 >> Z4 sDrive28i, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 (Dual-Clutch Automatic Transmission - Repair (N54) -- Z4_E89) >> Double Clutch Transmission Control Unit >> 28 60 010 Removing and installing Mechatronics (GS7D36SG)

28 60 010 Removing and installing Mechatronics (GS7D36SG)

WARNING: This page is about a different variant/trim than selected.
NOTE: When replacing Mechatronics:
IMPORTANT: It is essential to adhere to conditions of absolute cleanliness.

Any dirty parts must be cleaned before the hydraulic cap is loosened.

After completion of work, check GEARBOX OIL LEVEL .

Use only the approved TRANSMISSION OIL .

Failure to comply with this instruction will result in serious damage to the twin-clutch gearbox.

IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION) .

Necessary preliminary tasks: 

Place twin clutch transmission on a suitable surface.

To prevent the transmission oil from spilling out, make sure that the hydraulic cap points upward.

Remove HYDRAULIC CAP  (1).

Fig 1: Identifying Hydraulic Cover
G11150725Courtesy of BMW OF NORTH AMERICA, INC.

Ensure correct installation position.

Press holder (2) together from right and release cable (1).

Installation note: 

Replace holder.

Retaining lugs must point to the right.

If fitted: Pull out CPA pin (7) to second locking position.

Release connector lock (6) and at same time detach connector (3) from retaining tabs (5) towards right.

Fig 2: Identifying CPA Pin, Connector Lock And Holder
G11150726Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Bridge (4) of connector must not break.

Wiring harness must be replaced if bridge breaks.

CPA (1) in second locking position.

Installation note: 

Press CPA pin down until it is flush with the housing.

Fig 3: Identifying CPA In Second Locking Position
G11150727Courtesy of BMW OF NORTH AMERICA, INC.

Place mounting template over Mechatronics.

Open screws 1-20.

NOTE: Replace screws 1-12.

Screws 13-20 remain captive on module.

Fig 4: Transmission Control Unit Cover Screws Tightening Sequence
G11150728Courtesy of BMW OF NORTH AMERICA, INC.

Remove mounting template.

Lift Mechatronics out of housing.

Remove metal bead gasket.

Fig 5: Lifting Mechatronics Out Of Housing
G11150729Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Check the installation position of the centering pins (1).

The centering pins (1) of the Mechatronics remain in the housing.

Fig 6: Identifying Centering Pins
G11150730Courtesy of BMW OF NORTH AMERICA, INC.

Installing Mechatronics: 

Install a new metal bead gasket.

Install Mechatronics.

Fit mounting template.

IMPORTANT: Adhere without fail to the screwing sequence indicated on the template.

The screw length can be checked by means of the insert pockets shaped in the template.

  1. Insert screws in sequence 1-12 and pre-tighten to 2 Nm.
  2. Tighten down screws 1-12 to tightening torque and angle of rotation 28 60 2AZ .
  3. Tighten down screws in sequence 13-20 to 5 Nm.
  4. Remove mounting template.
  5. Fig 7: Transmission Control Unit Cover Screws Tightening Sequence
    G11150731Courtesy of BMW OF NORTH AMERICA, INC.