23 00 018 Removing and installing transmission (GS6-53BZ) N54

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

Special tools required:

IMPORTANT: 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.

IMPORTANT: After completion of work, check TRANSMISSION OIL LEVEL .

Use only approved transmission oil.

Failure to comply with this instruction will result in serious damage to the transmission.

IMPORTANT: For vehicles with N54/N55 engine up to production date 09/2012, aluminium bolts for the for the securing of the transmission are also installed.

As of production date 09/2012, only steel bolts are installed for the securing of the transmission.

NOTE: 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 ).

The aluminium bolts can be optionally replaced by steel bolts.

Necessary preliminary tasks:

CLAMP OFF BATTERY
Remove FRONT UNDERBODY PROTECTION
Remove REAR UNDERBODY PROTECTION
Remove complete EXHAUST SYSTEM
Remove heat shields
Support engine with jack when removing gearbox

Remove holder (1).

Fig 1: Identifying Holder

Release screws (1).

Disconnect connector (2).

Steel screws, tightening torque 23 00 1AZ .

Aluminium screws, tightening torque 23 00 2AZ .

Release aluminium screws with special tool 00 9 010 .

Fig 2: Identifying Connector

Release screws (1).

Remove holder (2).

Fig 3: Identifying Holder Screws

Unlock connector (1) from reversing light switch and detach.

Release cable from brackets.

Fig 4: Identifying Reversing Light Switch Connector

Release screws (1).

Remove exhaust bracket (2).

Tightening torque 23 71 4AZ .

NOTE: Graphic similar

Fig 5: Identifying Exhaust Bracket With Screws

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.

Fig 6: Supporting Transmission With Special Tools (23 4 050) And (00 2 030)

Release bolts (1) and nuts (2) and remove cross-member.

Tightening torque 23 71 2AZ .

Fig 7: Identifying Cross-Member Bolts And Nuts

REMOVE propeller shaft from transmission.
Release centre 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.
Support engine with lifter when removing transmission.

NOTE: Pressure line of clutch slave cylinder remains connected.

IMPORTANT: Relieve tension on clutch slave cylinder slowly; otherwise air will be drawn in through sealing cup.

Fig 8: Locating Clutch Slave Cylinder Nuts

Release nuts and remove clutch slave cylinder.

Tightening torque 21 52 5AZ .

Lever out retainer (1).

Disengage gearshift rod (2).

Installation note:

Grease gearshift rod.

Grease, refer to BMW Service Operating Fluids.

Make sure shims (3) are in correct position.

Fig 9: Disengaging Gearshift Rod

Unlock bearing journal (1) in direction of arrow and remove.

Lift out gearshift arm.

Installation note:

Grease bearing journals (1).

Grease, refer to BMW Service Operating Fluids.

Fig 10: Removing Bearing Journal

Release screws.

In vehicles with an N54/N55 engine from production date 09/2012, only steel bolts are installed.

Steel screws, tightening torque 23 00 1AZ .

Aluminium screws/bolts (3, 4, 5, 9, 10), tightening torque 23 00 2AZ .

Fig 11: Transmission Housing Bolts Tightening/Loosening Sequence

IMPORTANT: Do not suspend the transmission from the transmission input shaft during removal and installation as this will deform the clutch disc. Pull out transmission towards rear and remove.

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.

Fig 12: Identifying Special Tool (00 9 120) And Magnet (00 9 130)

Angle of rotation 23 00 2AZ .

Installation note:

Check that fitting sleeves are correctly fitted.

Replace damaged fitting sleeves.

Ensure correct position of cover plate.

Fig 13: Identifying Dowel Sleeves

Installation note:

Check lubrication of transmission input shaft for sticky consistency. If grease is sticky, clean transmission input shaft and REPLACE CLUTCH DISC .

Check clutch disc for friction rust in gearing and REPLACE if necessary.

Mechanically remove existing grease and lining abrasion from gearings of clutch disc (with a cloth).

Fig 14: Locating Transmission Input Shaft

Installation note:

Greasing specification:

Remove and clean RELEASE BEARING AND RELEASE LEVER .
Push on grease scraper ring 21 2 240 to the limit position.
Grease gearing (1) of input shaft with a brush. refer to BMW Service Operating Fluids.
Detach grease scraper ring.

Fig 15: Identifying Grease Scraper Ring (21 2 240) And Splines