28 00 001 Removing and installing twin-clutch gearbox (GS7D36SG) N54

IMPORTANT: Before the gearbox is removed, it is imperative that a read-out is taken of the specific gearbox data status.
After completion of work, check oil level ..
Use only the approved DCTF-1 Pentosin (P/N 83 22 2 147 477).
Failure to comply with this requirement will result in serious damage to the twin-clutch gearbox!
Apply a thin coating of "MI_Setral- 43N" grease to transmission input shaft!

IMPORTANT: Aluminum screws/bolts must be replaced each time they are released.
Aluminum screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminum screws/bolts are not magnetic.
Jointing torque and angle of rotation must be observed without fail (risk of damage).

Necessary preliminary work

Read out transmission data of the gearbox to be replaced with the BMW diagnosis system
Clamp off BATTERY NEGATIVE LEAD .
Remove underbody protection at front and rear. See 51 47 490 REMOVING AND INSTALLING/REPLACING FRONT UNDERBODY PROTECTION .
Remove complete EXHAUST SYSTEM .
Support engine with lifter when removing transmission.

Release screws (1).

Remove exhaust bracket (2).

Remove bracket (3).

Fig 1: Identifying Bracket, Exhaust Bracket And Screws

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Disconnect connectors (1) and release leads.

Unfasten screws (2).

Remove cover plate (4).

Release aluminum bolt (3) on right next to cable retaining plate.

Aluminum screws must be replaced.

Tightening torque, see 28 00 1AZ in 28 00 DOUBLE CLUTCH GEARBOX .

Fig 2: Identifying Cover Plate, Connectors, Screws And Bolts

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Release screw (1).

Unlock retainer (2).

Release cable from lever and holder.

Fig 3: Identifying Screw And Retainer

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Supporting transmission

Support transmission with special tools 23 4 050 .

Secure transmission to mounting with tensioning strap (1).

Torque is in TRANSMISSION HOLDER .

After completion of work, check oil level .

Fig 4: Supporting Transmission Using Special Tools (23 4 050)

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Unfasten screws (1) and nuts (2).

Remove transmission cross-member.

Tightening torque 22 32 3AZ/4AZ .

Fig 5: Identifying Screws And Nuts

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Remove PROPELLER SHAFT .

Release screw (1).

Disconnect hydraulic lines (2) to transmission oil cooler.

Seal off pipes and connection holes on gearbox with plugs.

Installation note:

Replace sealing rings.

Fig 6: Identifying Hydraulic Lines Of Transmission Fluid Cooler With Screws

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Release nut (1) and bracket from transmission oil lines on oil sump.

Fig 7: Identifying Nut On Oil Sump

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Lower transmission
Unlock central transmission plug (1) by turning and disconnect.
Do not touch pins.
Release cable from retainers.

Operations are described in

Notes on mechatronics

IMPORTANT: Read and comply with important note.

Fig 8: Removing Central Transmission Plug

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Installation note:

Pay attention to routing and length of wiring harness.

Insert special tool 24 2 390 in sealing cup (1).

Fig 9: Inserting Special Tool (24 2 390) In Sealing Cup

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Release screws.

Installation note:

Observe screw fastening sequence without fail.

Tightening torque, see 28 00 1AZ in 28 00 DOUBLE CLUTCH GEARBOX .

Aluminum screws must be replaced.

Tightening torque and angle of rotation, aluminum screws (7.8.9.10.11), see 28 00 1AZ in 28 00 DOUBLE CLUTCH GEARBOX

Fig 10: Identifying Screw Fastening Sequence

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Installation note:

Tighten down screws/bolts to specified torque.

Special angle-of-rotation tool 00 9 120 with 00 9 130 MAGNET

Secure to floor plate and screw down aluminum screws/bolts in accordance with angle of rotation.

Angle of rotation, see 28 00 1AZ in 28 00 DOUBLE CLUTCH GEARBOX .

Fig 11: Securing Angle Of Rotation Using Special Tool (00 9 120) And Magnet (00 9 130)

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Installation note:

Apply a thin coating of "MI_Setral-43N" grease to transmission input shaft!

BMW part number EU: 83 23 2 152 082

BMW part number USA: 83 23 2 152 081

Check that fitting sleeves are correctly fitted.

Replace damaged fitting sleeves.

Fig 12: Identifying Dowel Sleeves

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