23 00 018 Removing and Installing Transmission (GS6-53BZ)
23 00 018 - Removing and installing transmission (GS6-53BZ) N54
Special tools required:
Important!
After completion of work, check gear oil level Service and Repair.
Use only the approved gear oil.
Failure to comply with this requirement will result in serious damage to the manual transmission.
Important!
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).
Necessary preliminary tasks:
- Disconnect battery 12 00 ... Instructions For Disconnecting and Connecting Battery
- Remove front underbody protection Removing and Installing/Replacing Front Underbody Protection
- Remove rear underbody protection Removing and Installing/Replacing Rear Underbody Protection
- Remove complete exhaust system Service and Repair
- Remove heat shields
- Support engine with lifter when removing transmission
Remove brackets (1-3).
Release screws (1).
Disconnect connector (2).
Steel screws, tightening torque 23 00 1AZ [1][2]23 00 Transmission In General.
Aluminium screws, tightening torque 23 00 2AZ [1][2]23 00 Transmission In General.
Release aluminium screws with special tool 00 9 010 00 9 010 Torx E18 Socket.
Release screws (1).
Remove holder (2).
Unlock plug (1) from reversing light switch and detach.
Release cable from retainers.
Release screws (1).
Remove exhaust system bracket (2).
Tightening torque 23 71 4AZ 23 71 Transmission Mounts.
Note:
Illustration similar
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 Transmission bracket 23 .. ... 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 propeller shaft from transmission.
- Release centre bearing.
- Tie propeller shaft to one side.
Tasks are described in Removing propeller shaft 26 11 000 Removing and Installing Propeller Shaft (Inserted) Completely.
Important!
Do not allow propeller shaft to hang from fixed ball joint (risk of damage).
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 Specifications.
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.
Release screws.
Steel screws, tightening torque 23 00 1AZ [1][2]23 00 Transmission In General.
Aluminium screws/bolts (3, 4, 5, 9, 10), tightening torque 23 00 2AZ [1][2]23 00 Transmission In General.
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:
Tighten down screws/bolts to specified torque.
Secure special angle-of-rotation tool 00 9 120 with magnet 00 9 130.
Secure to floor plate and screw down aluminium screws/bolts in accordance with angle of rotation.
Angle of rotation 23 00 2AZ [1][2]23 00 Transmission In General.
Installation Note:
Check that dowel sleeves are correctly seated.
Replace damaged dowel sleeves.
Ensure correct position of cover plate.
Installation Note:
Check lubrication of transmission input shaft for sticky consistency. If grease is sticky, clean input shaft and replace clutch plate Service and Repair.
Check clutch plate for friction rust in splines and replace Service and Repair if necessary.
Mechanically remove existing grease and lining abrasion from splines of clutch plate (with a cloth).
Installation Note:
Greasing specification:
- Remove and clean release bearing and release lever Service and Repair.
- 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.