24 00 033 Removing and installing automatic transmission (GA8HP45Z) N20

WARNING: This page is about a different variant/trim than selected.

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:

Clamp off battery .
Remove underbody protection at front and rear.
Remove EXHAUST SYSTEM .
Remove heat shields.
Partially remove PROPELLER SHAFT .
- Disconnect propeller shaft at transmission.
- Release centre mount.
- Tie up propeller shaft to underbody.
  NOTE: Bending the propeller shaft by an excessive angle can cause premature damage to the joint/propeller shaft!
Support engine with lifter when removing transmission.

Unscrew nuts (1).

Remove heat shield (2).

Fig 1: Identifying Heat Shield Nuts

G11087317

Slacken nut (1).

Remove heat shield (2).

Fig 2: Identifying Heat Shield Nut

G11087300

Release screws (1).

Tightening torque 24 11 6AZ .

Fig 3: Identifying Heat Shield Screws

G09921674

Release screw (1).

Disconnect hydraulic lines (2) to transmission oil cooler.

Tightening torque 17 22 1AZ .

Installation note:

Replace sealing rings.

Fig 4: Identifying Transmission Oil Cooler Hydraulic Lines And Screw

G09921675

Unscrew nuts (1).

Tightening torque 18 20 1AZ .

Unfasten screws (2).

Tightening torque 24 00 1AZ .

Remove bracket (3).

Fig 5: Identifying Bracket, Nuts And Screws

G11087218

Release screws (1).

Tightening torque 24 00 2AZ .

Remove cover plate (2) downwards.

Fig 6: Identifying Cover Plate And Screws

G09921677

Remove cover.

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 7: Identifying Torque Converter Screw

G06889441

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 8: Removing Knurled Screw From Special Tool (2 222 741)

G09921679

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.

Fig 9: Disconnecting Connector

G08512171

Insert special tool 24 2 390 in sealing cup (1).

Tasks are described in Gearbox holder.

NOTES ON MECHATRONICS

IMPORTANT: Read and comply with important note.

Fig 10: Inserting Special Tool (24 2 390) In Sealing Cup

G09848385

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 11: Supporting Transmission With Special Tools (23 4 050) And (00 2 030)

G05758007

Release screws (3).

Tightening torque 22 32 4AZ .

Fig 12: Identifying Transmission Screws

G10099848

Release screws.

Tightening torque 24 00 1AZ .

Fig 13: Transmission Housing Bolts Tightening/Loosening Sequence

G05476356

Installation note:

Check fitting sleeves (2 and 3) for correct fit.

Replace damaged fitting sleeves.

Fig 14: Identifying Driving Plate Bore Hole And Fitting Sleeves

G09946522

Installation note:

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

Flange automatic transmission to engine.