Installing the automatic transmission (GA8HP51Z)

NOTE: RISK OF DAMAGE
Damage to the transmission .
Damage to the transmission due to unapproved transmission oil .

Use only the approved transmission oil.
Check the transmission oil level after completing the repair.

NOTE: RISK OF DAMAGE
Improper screw length can cause component damage .
The use of screws of improper length can lead to component damage .

Note the correct screw length.
Install screws that correspond to the original length.

NOTE: TECHNICAL INFORMATION
After completion of the work, program the control unit for the electronic gearbox control (EGS).

Checking installation position of torque converter

NOTE: RISK OF DAMAGE
Damage to the automatic transmission/impeller .
When disconnecting the engine and transmission, the torque converter can become loose! Failure to observe the correct installation positions of the torque converter may lead to damage to the impeller driver .

Make sure that the torque converter is in the correct installation position before installing the automatic transmission.

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Check the installation dimension between the contact surfaces (1) and the outer edge (2) of the threaded hole of the torque converter with the special tool 0 490 189 (00 2 550) .
See repair instructions
- Removing and installing/replacing torque converter
NOTE:
RISK OF DAMAGE
Damage of the flywheel and automatic transmission .
A non-horizontal fit during the removal and installation of the automatic transmission can lead to damage on the automatic transmission or flywheel .
- Align the automatic transmission completely horizontal to the engine during the removal and installation.
- Check for correct alignment before tightening the transmission bolts.
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Before installing the automatic transmission, align it horizontally to the engine.
Check the fitting sleeves (1) for correct seating and damage and replace if necessary.

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Transmission flange-mount.
Turn the torque converter until the bore of the torque converter is aligned with the bore of the drive plate.
Position the transmission bolts (arrows) and tighten, hand-tight.

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Turn the knurled screw (2) until the plate (3) is no longer in contact.
Release screws (1) and remove the special tool 5 AOC 1B9 .

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Replace screws (1) .
Parts: Screws

Tighten the screws (1) on the front axle support.

TIGHTENING TORQUE SPECIFICATION

Front axle carrier to body, rear
M14 Replace screws.	tightening torque	175 Nm

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Release screw (1) and screw (2) .
Remove the special tool 0 494 451 (24 4 160) .

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Install the sealing cap (1) .

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Replace screws.
Parts: Screws
Turn the engine in the direction of rotation using special tool 0 493 380 (11 6 480) on the vibration damper to tighten all 6 screws (1) .

Tighten all 6 screws (1) of the torque converter using special tool 0 491 667 (24 1 110) .

TIGHTENING TORQUE SPECIFICATION

Torque converter to flywheel
M10 Replace screws.	tightening torque	56 Nm

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Install acoustic cover (4) .
Install expanding rivet (3) .

Install the holder (2) and tighten the screw (1) .

TIGHTENING TORQUE SPECIFICATION

Transmission to engine
M8	Tightening torque	19 Nm
M12	Tightening torque	66 Nm

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Remove the special tool 0 494 213 (24 2 390) from the sealing sleeve in the arrow direction.

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NOTE: TECHNICAL INFORMATION
Notes on mechatronics are a fundamental requirement for these repair instructions and must be complied with at all times.
For additional information see: Notes on mechatronics (GA8HP50Z, GA8HP51Z, GA8HP75Z, GA8HP76Z) Refer to: 24 34 SHIFT VALVES, PARKING LOCK
Slide the connector (1) in the arrow direction and lock by turning in arrow direction.

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Tighten the transmission bolts in the sequence (1) to (9) .

TIGHTENING TORQUE SPECIFICATION

Transmission to engine
M8	Tightening torque	19 Nm
M12	Tightening torque	66 Nm

Fig 1: Transmission Bolts Tightening Sequence

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Install the ground strap (2) .

Tighten down screw (1) .

TIGHTENING TORQUE SPECIFICATION

Ground strap to transmission or body
M8	tightening torque	19 Nm

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Follow-up work

Refer to INSTALLING TRANSMISSION CROSS MEMBER .
Refer to SECURING THE HYDRAULIC LINES TO THE TRANSMISSION .
Refer to INSTALLING THE EXHAUST BRACKET .
Refer to INSTALLING THE RETAINING PLATES .
Refer to FASTENING THE PROP SHAFT (PARTIALLY REMOVED) .
Refer to INSTALLING THE HEAT SHIELD .
Refer to INSTALLING STARTER MOTOR .
Refer to INSTALLING THE COMPLETE EXHAUST SYSTEM .
Refer to INSTALLING THE CONNECTING SUPPORTS ON THE TUNNEL .
Refer to CONNECTING NEGATIVE BATTERY CABLE OF THE SYSTEM BATTERY .
Refer to CHECKING/TOPPING UP THE OIL LEVEL IN THE AUTOMATIC TRANSMISSION .
Refer to INSTALLING THE UNDERBODY PROTECTION OF THE STEERING GEAR .
Refer to INSTALLING UNDERBODY PROTECTION AT REAR .
Refer to INSTALLING THE CENTER UNDERBODY PROTECTION .
Refer to INSTALLING FRONT UNDERBODY PROTECTION .
Refer to INSTALLING THE ACOUSTIC COVER FOR THE ENGINE, FRONT .
Refer to INSTALLING THE CLEAN AIR PIPE WITH THE RESONATOR .
Refer to INSTALLING ACOUSTIC COVER .