Removal and Replacement

28 00 001 Removing and installing twin-clutch gearbox (GS7D36SG) N54,N55

Special tools required:







IMPORTANT:
Before the gearbox is removed, it is imperative that a readout is taken of the specific gearbox data status using ISTA/P.
Twin-clutch gearbox must be shifted to position "N" before removal.
Changing gears is only possible with engine running.

After completion of work, check transmission oil level.
Use only the approved transmission oil.

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







Necessary preliminary tasks:
- Read out the gearbox data status via ISTA/P for the gearbox to be replaced.
- Shift transmission to position "N".
- Disconnect battery
- Remove underbody protection at front and rear
- Remove complete exhaust system
- Support engine with jack when removing transmission







Release screw (3).
Remove holder (4).
Slacken nut (5).
Remove holder (6).
Release screws (1).
Remove heat shield (2).







Disconnect connectors (1) and release leads.
Unfasten screws (2).
Remove cover plate (4).
Release aluminium bolt (3) on right next to cable retaining plate.
Aluminium screws must be replaced.
Tightening torque 28 00 1AZ.







Release screw (1).
Unlock retainer (2).
Release cable from lever and holder.







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 Gearbox holder.
After completion of work, check transmission fluid level.







Unfasten screws (1) and nuts (2).
Remove transmission cross-member.
Tightening torque 22 32 3AZ/4AZ.







- Remove propeller shaft from transmission.
- Release centre mount.
- IMPORTANT:
- Bending the propeller shaft by an excessive angle can cause premature damage to the joint/propeller shaft.
- Tie up propeller shaft to underbody.







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.







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







- Lower transmission
- Unlock central transmission connector (1) by turning and disconnect.
- Do not touch pins.
- Release cable from brackets.

Repair work is described in
Notes on mechatronics

IMPORTANT: Read and comply with important note.








Installation note:
Pay attention to routing and length of wiring harness.

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







Release screws.

Installation note:
Observe screw fastening sequence without fail.
Tightening torque, steel screws 28 00 1AZ.

Aluminium screws must be replaced.
Tightening torque and angle of rotation, aluminium screws 28 00 1AZ (7.8.9.10.11).







Installation note:
Tighten down screws/bolts to specified torque.

Special angle-of-rotation tool 00 9 120 with magnet 00 9 130
Secure to vehicle underbody and screw down aluminium screws/bolts in accordance with angle of rotation.
Angle of rotation 28 00 1AZ.







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.

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