24 00 033 Removing and Installing Automatic Transmission (GA8HP45Z)

24 00 033 Removing and installing automatic transmission (GA8HP45Z) N55

Special tools required:







IMPORTANT:
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 automatic 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 the battery
- Remove fan cowl
- Remove underbody protection
- Remove reinforcement plate

Important installation notes are described in this job item

- Release hose socket from charge air cooler on left and right.
- Remove exhaust system
- Remove heat shields
- Remove propeller shaft from front axle differential
- Detach propeller shaft at gearbox, release centre bearing
- Tie up propeller shaft to underbody.
- IMPORTANT:
- Bending the propeller shaft by an excessive angle can cause premature damage to the joint/propeller shaft.
- Support engine with jack when removing transmission







Remove upper part of cable duct (1).







Release screw (1).
Disconnect hydraulic lines (2) to transmission oil cooler.
Tightening torque 17 22 3AZ.

Installation note:
Replace sealing rings.







Release holder (1).
Detach hydraulic lines (2) from bracket (1).







Release screws (1).
Tightening torque 24 00 1AZ.
Slacken nut (2).
Remove bracket (3).







Release screws (1).
Remove holder (2).
Remove heat shield (3).







Prepare special tool (1) 24 4 161 (A) with shaped element (2) 24 4 166 as pictured.







Insert special tool 24 4 160 into recess of transmission housing and clamp gently with screw (1).
Raise by turning screw (2) and clamp down.
Then tighten down screw (1).







- Unlock and disconnect connector (1) by turning.
- Do not touch pins.
- Release cable from brackets.
- Insert special tool 24 2 390 in sealing cup.

Tasks are described in Gearbox holder.
Notes on mechatronics

IMPORTANT: Read and comply with important note.







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.
After completion of work, check transmission fluid level.







Release screws.
Tightening torque 22 32 3/6AZ.
Remove cross member.







Unplug connector (1) from transfer box control unit (longitudinal torque module).
Release screw (2).
Remove earth strap (3).







Crank engine at vibration damper in direction of rotation until screw (1) is visible in recess.
Release all 6 bolts of torque converter with special tool 24 1 110.

Installation note:
Replace converter screws.
Remove any remaining adhesive residue from the thread.
Tightening torque 24 40 1AZ.







Note installed position of brackets (1 and 2) when removing gearbox.







Release screws.

Installation note:
Observe screw fastening sequence without fail.
Tightening torque, steel screws 24 00 1AZ.
Aluminium screws must be replaced.
Tightening torque and angle of rotation
Aluminium screws 24 00 2AZ (7, 8, 9, 10, 11)







Installation note:
Bore hole (1) of drive plate must be accessible from recess on engine oil sump. Check fitting sleeves (2...3) for correct seating.
Replace damaged fitting sleeves.

NOTE: Graphic representation similar.







Installation note:
Rotate torque converter until bore hole in torque converter is flush with bore hole in drive plate.
Flange automatic transmission to engine.