23 00 028 Removing and installing transmission (GS6-45BZ)

WARNING: This page is about a different car, the 2018 BMW 340i and 2017 BMW 340i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

00 2 030
21 2 220
23 4 050
2 219 012

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!

After completion of repair work, check TRANSMISSION OIL LEVEL .

Use only the approved TRANSMISSION OIL .

Failure to comply with this requirement will result in serious damage to the manual gearbox.

Necessary preliminary tasks:

Disconnect battery negative lead .
Refer to REMOVE UNDERBODY PROTECTION AT FRONT AND REAR .
Refer to REMOVE EXHAUST SYSTEM .
Remove heat shields.
Support engine with lifter when removing transmission.
Partially remove PROPELLER SHAFT .
- Disconnect propeller shaft at transmission.
- Release center mount.
- Tie up the propeller shaft to the vehicle underbody.
  NOTE: Bending the propeller shaft by an excessive angle can cause premature damage to the joint/propeller shaft!

Removal:

Release screws (1).

Remove reinforcement bar (2).

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Slacken nut (1).

Detach cable (2) from starter.

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Unscrew nuts (1).

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Remove positive battery line (1) from the holder.

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Release screws (1).

Remove holder (2).

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Slacken nut (1).

Remove holder (2).

Unscrew nut (3).

Release ground strap (4) from body.

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Pressure line of clutch slave cylinder remains connected.

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

Remove bolts (1) and remove clutch slave cylinder (2) with holder (3).

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Supporting transmission:

Support transmission with special tools 23 4 050, 2 219 012.

Secure transmission to mounting with tensioning strap (1).

Tasks are described in UNIVERSAL BMW TRANSMISSION TAKE-UP .

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Release screws (1).

Release transmission cross-member from body.

Lower transmission.

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Pull off retaining clip (2).

Pull gearshift rod (1) out of gearshift rod joint (3).

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Unlock and remove bearing journal in direction of arrow.

Pull gearshift arm forward out of support bearing.

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Disconnect connector (1).

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Loosen screws.

Attention!

Do not allow transmission to hang on transmission input shaft when removing and installing, as the clutch disc will be deformed. Pull out transmission towards rear and remove.

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Installation:

Installation note:

Check that fitting sleeves (1) are correctly seated.

Replace damaged sleeves.

Ensure correct position of cover plate.

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Installation note:

Check lubrication of transmission input shaft for sticky consistency. If the grease is sticky, clean drive shaft and check to make sure the CLUTCH DISC IS FREE OF GREASE, REPLACE CLUTCH DISC IF NECESSARY .

Check clutch disc for frictional corrosion in gearing and replace IF NECESSARY .

Remove any grease and lining abrasion from gearing of clutch disc by mechanical means (with a cloth).

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Installation note:

Greasing specification:

Refer to REMOVE THE RELEASE BEARING AND RELEASE LEVER AND CLEAN (DO NOT GREASE)
Push on grease scraper ring 21 2 220 until limit position.
Grease gearing (1) of input shaft with a brush.
Refer to BMW SERVICE OPERATING FLUIDS
Detach grease scraper ring.
Refer to INSTALL THE RELEASE LEVER AND RELEASE BEARING

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Transmission flange-mount.

Insert screws and tighten lightly.

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Connect the connector (1).

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Grease bearing journal and bearing pin.

Grease, refer to BMW SERVICE OPERATING FLUIDS .

Insert gearshift arm into support bearing.

Install bearing journal in direction of arrow and lock in place.

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Grease the gearshift rod pin.

Grease, refer to BMW SERVICE OPERATING FLUIDS .

Hook gearshift rod (1) into gearshift rod joint (3).

Insert retaining clip (2).

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Install holder (2).

Insert screws (1) and tighten.

Tightening torque 23 00 1AZ

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Connect the positive battery cable (1).

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Insert nuts (1) and tighten.

Tightening torque 18 20 1AZ.

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Lightly tighten the remaining screws on the transmission.

Tighten the screws in the specified screwing sequence.

Tightening torque 23 00 1AZ .

Fig 1: Transmission Flange-Mount Screws Tightening Sequence

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Parts : Replace screws.

Install clutch slave cylinder (2) with holder (3).

Insert screws (1) and tighten.

Tightening torque 21 52 1AZ .

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Install the transmission cross member.

Insert screws (1) and tighten.

Tightening torque 22 32 3AZ .

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Release tensioning strap (1) from transmission.

Remove special tools 23 4 050, 2 219 012 and mounting from the transmission.

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Mount ground strap (4).

Fit nut (3) and tighten.

Install holder (2).

Position nut (1) and tighten.

Tightening torque 23 11 8AZ.

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Connect positive battery cable (1) to starter motor.

Move anti-twist lock for positive battery cable on starter up to limit position (2).

Tighten nut (3).

Tightening torque 12 41

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Fit reinforcement bar (2).

Insert screws (1) and tighten.

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