Removing and Installing Transmission

Special tools required:
- 00 1 450
- 11 8 022
- 24 0 170

Caution!
- After completion of work check transmission fluid level.
- Use only approved transmission fluid.
- Failure to comply with this instruction will result in serious damage to the transmission.

Necessary preliminary tasks:
- Disconnect battery.
- Remove reinforcement plate and underbody protection.
- Remove the entire exhaust system. Service and Repair
- E46 only: Remove heater bulkhead.
- E46 only: Remove intake hood.

- Remove heat shield (1).

- E46 only: Release screws and remove exhaust bracket (1).

- Z4 only: Release screws and remove exhaust bracket (1).

- Support transmission from underneath.
- Release screws and remove cross-member (1).
- Tightening torque: 42 Nm

- Unfasten screws.

- Tightening torque:
Installation note:
- Replace self-locking nuts.

- Grip propeller shaft and release nuts.

- Tightening torque:
- Bend propeller shaft downwards on center bearing.
- Detach propeller shaft from transmission output flange and tie back to side on vehicle underbody.

Installation (except E46 Compact and Z4):
- Detach masking tape from butylene tape on both sides.
- Attach butylene tape (1) to outside of center bearing (2).

Caution!
- Remove any butylene tape already fitted on center bearing.
- Clean adhesive area on center bearing and on body.
- Then coat adhesive area on body with mineral oil (to enable the sticky butylene tape to feed easily into the propeller shaft tunnel).
- This prevents any deformation of the butylene tape.

Installation (except E46 Compact and Z4):
- Press center bearing (2) into transmission tunnel.

- Lower transmission.
E46 only:
- Lower until cylinder head touches end wall.
- Suspend special tool 11 8 022 from left and right control arms.

Caution!
- Position special tool so that engine oil sump rests securely on special tool.
- Tighten down knurled screws until special tool fits tightly with engine oil sump.

Caution!
- Relieve tension on clutch slave cylinder slowly when removing; otherwise air will be drawn in through sealing sleeve.
- Release nuts and remove clutch slave cylinder. Pressure pipe remains connected.
- Tightening torque: 22 Nm

- Detach locking clamp.

- Pull shift rod (1) out of shift rod joint (2) and remove shims (3).
Installation note:
- Grease shift rod pin (4) (using BMW approved lubricant).
- Large contact surface of shims (3) must rest on shift rod joint (2).

- Use a screwdriver to lift out spring (1) from the lug (2) on the housing and swivel upwards.

- Remove bearing pin (1).
Installation note:
- Grease bearing pin (1) (using BMW approved lubricant).

- Detach cable plug (1) from reverse gear switch. If necessary release cable from fixtures.

- Support transmission with workshop hoist.
- Unfasten screws.

- Tightening torque:

Caution!
- Do not allow the transmission to hang from the transmission input shaft during removal and installation as this will deform the clutch plate.

- Pull out transmission towards rear as far as possible rotate approx. 10° counterclockwise and remove.

Subsequent work on transmission
- Support transmission with special tool 24 0 170 on assembly stand 00 1 450

Installation:
- Pay attention to adapter sleeves (1 and 2) replace if necessary.
- Ensure correct position of cover plate.
Installation note:
- Remove release unit and release lever clean and apply grease to relevant points.

Installation:
- Check lubrication of transmission input shaft for sticky consistency. If grease is sticky replace clutch plate.
- Check clutch plate for friction rust in taper splines and replace if necessary.
- Mechanically remove old grease and lining abrasion from the taper splines of the clutch disk (with a cloth).
- Then to grease the taper splines apply a thin uniform layer of new grease (sourcing reference: BMW Parts Service) with a brush to the entire area of the taper splines. Also in taper groove and on guide pin.