24 00 033 Removing And Installing Automatic Transmission (GA8HP45Z) N20 AWD

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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:

Do not let skin come in contact with transmission oil and do not inhale fuel vapors.
Wear protective gloves.
Ensure adequate ventilation.

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:

Clamp off BATTERY .
Remove underbody protection at front and rear. See 51 47 490 REMOVING AND INSTALLING/REPLACING UNDERBODY PROTECTION (FRONT) or 51 47 491 REMOVING AND INSTALLING/REPLACING REAR UNDERBODY PROTECTION .
Remove EXHAUST SYSTEM .
Remove heat shields.
Remove PROPELLER SHAFT .

Release screw (1).

Remove holder (2).

Fig 1: Automatic Transmission Holder And Screw

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Release screws (1).

Tightening torque: 24 11 6AZ .

Remove the protective plate (2).

Fig 2: Protective Plate And Screw

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Release screw (1).

Disconnect hydraulic lines (2) to transmission oil cooler.

Tightening torque: 17 22 1AZ .

Installation note:

Replace sealing rings.

Fig 3: Transmission Oil Cooler Hydraulic Lines And Screw

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Unscrew nuts (1).

Tightening torque: 18 20 1AZ .

Unfasten screws (2).

Tightening torque: 18 20 2AZ .

Remove bracket (3) and catalytic converter (5).

Unscrew nuts (4).

Tightening torque: 18 20 1AZ .

Remove rubber mounts for catalytic converter.

Fig 4: Catalytic Converter, Bracket, Nuts And Screws

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Release screws (1).

Tightening torque: 24 00 3AZ .

Remove cover plate (2) downwards.

Remove cover.

Fig 5: Cover Plate And Screws

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Crank engine at vibration damper in direction of rotation until screw (1) is visible in recess.

Undo all 6 bolts on torque converter.

Tightening torque: 24 40 1AZ .

IMPORTANT: Replace all 6 bolts on torque converter.

Fig 6: Torque Converter Bolts

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Unscrew knurled screw (1) from special tool 2 222 741 (do not remove completely) before inserting in the recess of the transmission housing.

Insert special tool 2 222 741 and shaped element (3) in the recess.

Slightly tighten knurled nut (2).

Screw in knurled screw (1) fully.

Locating pin (4) must be located between converter and engine.

Move special tool 2 222 741 in the recess until the locating pin (4) rests against the converter.

Fig 7: Inserting Special Tool (2 222 741)

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Use knurled nut (2) to fix special tool 2 222 741 and converter in position.

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 8: Removing Connector

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Unplug connector (1) from transfer box control unit (longitudinal torque module) (3).

Fig 9: Transfer Box Control Unit Connector

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Release screw (1) on left and right of axle.

Remove cover plate (2) on left and right of axle.

Remove bolt (3) on left and right of axle.

Tightening torque: 31 10 1AZ .

Fig 10: Axle Cover Plate, Screw And Bolt

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Screw on special tool 11 8 910 .

Fig 11: Special Tool (11 8 910)

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Adjust distance (1) between cross bar and facing using nuts (2).

Nuts (2) must be screwed down in opposite direction after distance has been adjusted.

IMPORTANT: Distance: 53 mm

Fig 12: Cross Bar And Nuts Distance

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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 .

Fig 13: Supporting Transmission Using Special Tools

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Release screws (1).

Tightening torque: 22 32 3AZ .

Fig 14: Transmission Bracket And Screws

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Release nut (1) from ground strap (2).

Tightening torque: 24 11 7AZ .

Fig 15: Ground Strap And Nut

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Release screws.

Tightening torque: 24 00 1AZ .

Fig 16: Transmission Housing Bolts Tightening/Loosening Sequence

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Installation note:

Check that fitting sleeves (1) are correctly seated.

Replace damaged fitting sleeves.

Fig 17: Automatic Transmission Fitting Sleeves

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Installation note:

Twist torque converter until bore hole in torque converter is flush with bore hole of flywheel.

Flange automatic transmission to engine.