23 00 019 Removing and installing transmission (GS6-37BZ N52K)
Special tools required:
- 00 2 030 UNIVERSAL HYDRO-LIFTER BASIC UNIT
- 00 9 110 CIRCLIP PLIERS
- 00 9 120 TORQUE ANGLE MEASURING DIAL
- 00 9 130 MAGNET WITH 1/2" CONNECTION
- 21 2 221, see 21 CLUTCH
- 23 0 132, see 23 MANUAL TRANSMISSION
- 23 4 050, see 23 MANUAL TRANSMISSION
Use only the approved gear oil .
Failure to comply with this requirement will result in serious damage to the manual transmission.
No steel screws/bolts may be used due to the threat of electrochemical corrosion.
A magnesium crankcase requires aluminium screws/bolts exclusively.
Aluminium screws/bolts must be replaced each time they are released .
The end faces of these screws/bolts are painted blue for the purposes of reliable identification.
Jointing torque and angle of rotation must be observed without fail (risk of damage) .
Necessary preliminary tasks:
- Disconnect battery
- Remove underbody protection with bracket at front and rear
- Remove reinforcement plate
- Remove complete exhaust system
- Remove heat shields
- Remove front propeller shaft at transfer box and tie to one side, see REMOVAL & INSTALLATION .
- Support engine with lifter when removing transmission
- Remove propeller shaft from transmission.
- Release center bearing.
- Tie propeller shaft to one side.
Tasks are described in Removing propeller shaft, see REMOVAL & INSTALLATION .
Detach plugs (1) and (2) from servomotor.
Detach plug (1) from reversing light switch.
Release cable from mountings and tie to one side.
Release nuts and remove clutch slave cylinder.
Tightening torque: 21 52 5AZ, see 21 52 CLUTCH OPERATION (HYDRAULIC) .
Installation:
Release aluminium screw on right next to cable retaining plate with special tool 00 9 010 .
Installation:
Aluminium screws must be replaced.
Tightening torque: 23 00 2AZ, see 23 00 TRANSMISSION IN GENERAL .
Supporting transmission:
Support transmission with special tools 23 4 050, 23 0 132 , 00 2 030 .
Secure transmission with tensioning strap (1).
Tasks are described in 23 .. UNIVERSAL TRANSMISSION BRACKET .
After completion of work, check transmission oil level.
Unfasten screws and remove transmission cross-member.
Tightening torque: 22 32 4AZ/5AZ, see 22 32 TRANSMISSION MOUNTS .
Unlock bearing pin (1) in direction of arrow and remove.
Lift out shift arm.
Installation:
Grease bearing pins (1).
Lift off retainer (1).
Disconnect shift rod (2).
Installation:
Grease shift rod.
Make sure shims (3) are in correct position.
Release screws.
Installation:
Observe screw fastening sequence without fail.
Tightening torque, steel screws: 23 00 1AZ, see 23 00 TRANSMISSION IN GENERAL .
Aluminium screws must be replaced.
Tightening torque and angle of rotation
Aluminium screws: 23 00 1AZ, see 23 00 TRANSMISSION IN GENERAL .
Installation:
Secure angle of rotation special tool 00 9 120 with magnet 00 9 130 to floor plate.
Screw down aluminium screws according to angle of rotation.
Angle of rotation: 23 00 2AZ, see 23 00 TRANSMISSION IN GENERAL .
Installation:
Check that dowel sleeves are correctly seated.
Replace damaged dowel sleeves.
Ensure correct position of cover plate.
Installation:
Check lubrication of transmission input shaft for sticky consistency. If grease is sticky, clean input shaft and replace clutch plate, see 21 21 500 REMOVING AND INSTALLING/REPLACING CLUTCH (SAC) .
Check clutch plate for friction rust in splines and replace if necessary.
Mechanically remove existing grease and lining abrasion from splines of clutch plate (with a cloth).
Installation:
Greasing specification:
- Remove and clean release bearing and release lever, see 21 51 500 REMOVING AND INSTALLING OR REPLACING CLUTCH RELEASE BEARING/LEVER .
- Push on grease scraper ring 21 2 221 as far as it will go.
- Grease splines (1) of input shaft with a brush.
- Detach grease scraper ring.