8 60 514 Replacing Mechatronics (GS7D36SG)

WARNING: This page is about a different variant/trim than selected.

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 Cover

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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.

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

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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

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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.

Fig 4: Transmission Control Unit Cover Screws Tightening Sequence

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Remove mounting template.

Lift Mechatronics out of housing.

Remove metal bead gasket.

Fig 5: Lifting Mechatronics Out Of Housing

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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

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

Fig 7: Identifying Mechatronics With Shift Piston In Neutral Position

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In the gearbox the gearshift rods must be set to neutral position (N) as illustrated before the new Mechatronics are fitted.

Fig 8: Identifying Neutral Position Of Gearshift Rods

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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.

Insert screws in sequence 1-12 and pre-tighten to 2 Nm.
Tighten down screws 1-12 to tightening torque and angle of rotation 28 60 2AZ .
Tighten down screws in sequence 13-20 to 5 Nm.
Remove mounting template.

Fig 9: Transmission Control Unit Cover Screws Tightening Sequence

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