28 00 001 Removing and installing twin-clutch gearbox (GS7D36SG) N54
Special tools required:
Attention!
To prevent heavy damage to the engine block, the protruding thread of the transmission bolts absolutely must be checked for damage and corrosion before removal .
If there are signs of corrosion, the rust must be removed and the threads must be cleaned before removal .
Replace rusted, damaged screws.
Failure to comply with this instruction will result in serious damage to the engine block and transmission.
Attention!
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!
Attention!
Aluminium screws/bolts must be replaced each time they are released.
Aluminium screws/bolts are permitted with and without color 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 ).
In vehicles with an N54/N55 engine from production date 09/2012, only steel bolts are installed.
Necessary preliminary tasks:
- Read out the gearbox data status via ISTA/P for the gearbox to be replaced.
- Shift transmission to position "N".
- Clamp off BATTERY .
- Remove underbody protection at front and rear. See REMOVING FRONT UNDERBODY PROTECTION and REMOVING REAR UNDERBODY PROTECTION .
- Remove complete EXHAUST SYSTEM .
- Support engine with lifter when removing transmission.
Release screws (1).
Remove exhaust bracket (2).
Remove bracket (3).
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 center mount.
-
NOTE: 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 plug (1) by turning and disconnect.
- Do not touch pins.
- Release cable from brackets.
Repair work is described in NOTES ON MECHATRONICS
Attention!
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).
Loosen screws.
In vehicles with an N54/N55 engine from production date 09/2012, only steel bolts are installed.
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.