28 60 514 Replacing mechatronics (GS7D36SG)

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NOTE: When replacing mechatronics:

Import present transmission data into new mechatronics via ISTA/P

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:

Read out transmission data of mechatronics to be replaced via ISTA/P .
Remove TWIN-CLUTCH GEARBOX .

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 Cap

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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.

Fig 2: Identifying Holder, Cable And Connector Lock

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

IMPORTANT: Bridge (4) of connector must not break.
Wiring harness must be replaced if bridge breaks.

CPA (1) in second locking position.

Installation note:

Fig 3: Identifying CPA

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

Fig 4: Automatic Transmission Valve Body (Mechatronics) Screws Tightening/Loosening Sequence

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Place mounting template over mechatronics.

Open screws 1-20.

NOTE: Replace screws 1-12.
Screws 13-20 remain captive on module.
Remove mounting template.
Lift mechatronics out of housing.
Remove metal bead gasket.

Fig 5: Removing Metal Bead Gasket

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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 Installation Position

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The new mechatronics are supplied with the shift piston in neutral position as illustrated.

Fig 7: Identifying Mechatronics Shift Piston Neutral Position

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In the gearbox, the gearshift rods have to be set to the neutral position '(N) as shown here before the new mechatronics are installed.

Fig 8: Identifying Gearshift Rods Neutral Position

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Installing mechatronics:

Install a new metal bead gasket.

Install mechatronics.

Fit mounting template.

Fig 9: Automatic Transmission Valve Body (Mechatronics) Screws Tightening/Loosening Sequence

Courtesy of BMW OF NORTH AMERICA, INC.

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.

Insert screws in sequence 1-12 and pre-tighten to 2 Nm.

Tighten down screws 1-12 to tightening torque and angle of rotation. See chart:

	Type	Thread	Tightening specifications	Dimension
2AZ Mechatronics to transmission	GS7D36SG	M5x30	Jointing torque Torque angle	3 Nm + 50°
		M5x35	Jointing torque Torque angle	3 Nm + 50°
		M5x50	Jointing torque Torque angle	3 Nm + 50°
		M5x75	Jointing torque Torque angle	3 Nm + 90°

Tighten down screws in sequence 13-20 to 5 Nm.
Remove mounting template.