Removing and Installing Transmission (GS6-53BZ)

23 00 018 - Removing and installing transmission (GS6-53BZ) (S85)

Special tools required:
- 00 2 030 00 2 030 Universal Hydro-Lifter Basic Unit
- 21 2 240 21 2 240 Grease Scraper Ring
- 23 4 050 23 4 050 Universal Transmission Bracket

Important!
After completion of work, check gearbox oil level Procedures.

Use only approved transmission oil.

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

Note:
When removing and installing the transmission, without fail use the transmission bracket 23 4 050 23 4 050 Universal Transmission Bracket and a jack to support the engine.

Failure to comply with this instruction may result in preliminary damage to the clutch and splined shaft.

Necessary preliminary tasks:
- Disconnect battery
- Remove underbody protection at front and rear
- Remove complete exhaust system Service and Repair
- Remove reinforcement plate Service and Repair
- Remove heat shields
- Support engine with lifter

Remove heat shields (1/2)

Release and disconnect plugs (1) from holders.

Unscrew nuts (1).

Cut open cable tie (2).

Remove retaining plate.

Release screw (1).

Bend plate (2) to one side.

Unscrew nut (3).

Remove holder (4).

Release screw (1).

Remove crankshaft sensor (2).

Unscrew bolt (3).

Bend plate (4) to one side.

Unlock and disconnect plug (1).

Unlock plug (1) from reversing light switch and disconnect.

Release cable from retainers.

Release bolts (1).

Tightening torque 23 00 1AZ Transmission in General.

Supporting transmission:

Support transmission with special tools 23 4 050 23 4 050 Universal Transmission Bracket, 00 2 030 00 2 030 Universal Hydro-Lifter Basic Unit.

Secure transmission to mounting with tensioning strap (1).

Tasks are described in Transmission bracket Universal BMW Transmission Take-Up.

After completion of work, check transmission oil level.

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

Tightening torque 23 71 2AZ 23 71 Transmission Mounts.

- Remove complete propeller shaft Removing and Installing Complete Propeller Shaft (Constant-Velocity Joint)

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 sleeve.

Release nuts and remove clutch slave cylinder.

Tightening torque 21 52 5AZ [1][2]Clutch Hydraulic System.

Lever out retainer (1).

Disengage shift rod (2).

Installation Note:
Grease shift rod.

Grease, refer to BMW Service Operating Fluids.

Make sure shims (3) are in correct position.

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

Lift out shift arm.

Installation Note:
Grease bearing pins (1).

Grease, refer to BMW Service Operating Fluids.

Unlock plug (1) of zero-gear sensor (ON TRANSMISSION) and disconnect.

Release remaining eight bolts (1/2).

Important!
Bolts (2) are longer than bolts (1)

Tightening torque 23 00 1AZ Transmission in General.

Note:
Bolt (3) must not be released.

Bolt (3) serves to secure the starter motor.

Important!
Do not suspend the transmission from the transmission input shaft during removal and installation as this will deform the clutch plate. Pull out transmission towards rear and remove.

Installation Note:
Check that adapter sleeves (1) are correctly seated.

Replace damaged dowel sleeves.

Note:
When removing and installing the transmission, without fail use the transmission bracket 23 4 050 23 4 050 Universal Transmission Bracket and a jack to support the engine.

Failure to comply with this instruction may result in preliminary damage to the clutch and splined shaft.

Installation Note:
Check lubrication of transmission input shaft for sticky consistency. If grease is sticky, clean input shaft and replace clutch plate 6 Speed.

Check clutch plate for friction rust in splines and replace 6 Speed if necessary.

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

Installation Note:
Greasing specification:

- Remove and clean release bearing and release lever Removing and Installing/Replacing Clutch Release Bearing/Lever.
- Push on grease scraper ring 21 2 240 21 2 240 Grease Scraper Ring as far as it will go.
- Grease splines (1) of input shaft with a brush. Refer to BMW Service Operating Fluids.
- Detach grease scraper ring.