24 00 033 Removing and installing automatic transmission (GA8HP45Z) (N47)

Special tools required:

IMPORTANT: To prevent heavy damage to the engine block, the protruding thread of the transmission bolts absolutely must be checked for damage and corrosion before removal.
If there are signs of corrosion, the rust must be removed and the threads must be cleaned before removal.
Replace rusted, damaged screws.

Failure to comply with this instruction will result in serious damage to the engine block and transmission.

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!

Necessary preliminary tasks:

Disconnect the BATTERY
Remove underbody protection
Remove REINFORCEMENT PLATE
Important installation notes are described in this job item
Remove EXHAUST SYSTEM
Remove heat shields
REMOVE STARTER MOTOR
Remove PROPELLER SHAFT FROM FRONT AXLE DIFFERENTIAL
Detach PROPELLER SHAFT at gearbox, release center bearing
Note:
Bending the propeller shaft by an excessive angle can cause premature damage to the joint/propeller shaft!
Tie up propeller shaft to underbody.
Support engine with jack when removing gearbox

Release screw (1).

Disconnect hydraulic lines (2) to transmission oil cooler.

Tightening torque 17 22 3AZ .

Installation note:

Replace sealing rings.

Fig 1: Identifying Transmission Oil Cooler Hydraulic Lines And Screw

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Detach cable holder (1) from gearbox.

Unfasten screws (2).

Tightening torque 24 00 1AZ .

Unscrew nuts (3).

Remove holder (4).

Tightening torque 18 20 1AZ .

Fig 2: Identifying Cable Holder From Gearbox, Screws And Nuts

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

Fig 3: Identifying Special Tool 24 4 161

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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).

Fig 4: Inserting Special Tool 24 4 160 Into Recess Of Transmission Housing

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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.

Fig 5: Disconnecting Connector

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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.

Fig 6: Supporting Transmission Using Special Tools

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Release screws.

Tightening torque 22 32 3/6AZ .

Remove cross member.

Fig 7: Locating Cross Member Screws

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Unplug connector (1) from transfer box control unit (longitudinal torque module).

Release screw (2).

Remove earth strap (3).

Fig 8: Identifying Transfer Box Control Unit Connector, Earth Strap And Screw

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Crank engine with special tool 11 6 480 at the vibration damper in direction of rotation until screw (1) is visible in the recess.

Release all 4 bolts of torque converter with special tool 24 1 110 .

Installation note:

Replace converter screws. Remove any remaining adhesive residue from the thread.

Fig 9: Identifying Vibration Damper Screws

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Tightening torque 24 40 1AZ .

Release bolts and remove transmission.

Tightening torque 24 40 1AZ .

NOTE: Graphic similar

Fig 10: Locating Transmission Bolts

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Installation note:

Bore hole (1) of driving plate must be accessible from recess on engine oil sump. Check that fitting sleeves (2...3) are correctly seated.

Replace damaged fitting sleeves.

Fig 11: Identifying Driving Plate Bore Hole And Fitting Sleeves

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Installation note:

Rotate torque converter until bore hole in torque converter is flush with bore hole in drive plate.

Flange automatic transmission to engine.