Install automatic transmission (GA8HP51Z)

Checking installation position of torque converter 

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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

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• Align the automatic transmission horizontal to the engine before installation.
• Check the fitting sleeves (1) for correct seating and damage and replace if necessary.

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• Transmission flange-mount.
• Rotate torque converter until bore in torque converter is flush with bore in drive plate.
• Fit the transmission bolts (arrows) and apply 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 5A0C1B9. 

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• Replace screws (1).

  Parts:  Screws

• Tighten the screws (1) on the front axle support.
  TIGHTENING TORQUES SPECIFICATION
  
  

  Front axle carrier to body, rear
  M14 Replace screws.	Joining torque	108 Nm
  	Angle of rotation	45°

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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

• Crank the engine on the vibration damper in the direction of rotation using special tool 0 493 380 (116 480)  to tighten all six screws (1).
• Tighten all 6 screws (1) of the torque converter using special tool 0 491 667 (24 1 110). 
  TIGHTENING TORQUES SPECIFICATION
  
  

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

• Install acoustic cover (2).
• Install expanding rivet (1).

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• Install the exhaust bracket (2).
• Tighten down screws (1).
  TIGHTENING TORQUES SPECIFICATION
  
  

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

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• Tighten nuts (1).

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

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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: 24 34... Notes on mechatronics (GA8H P50Z/GA8H P51Z/GA8H P75Z/GA8H

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• Slide the connector (1) on and turn it to lock.
• Tighten the transmission bolts in sequence (1) to (9).
  TIGHTENING TORQUES SPECIFICATION
  
  

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

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• Replace sealing rings.

  Parts  : Sealing ring

• Install hydraulic lines (2) on the transmission in the direction of the arrow.
• Position and tighten the screw (1).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Transmission oil line to transmission
  M6x25 Replace the sealing ring.	Tightening torque	8 Nm

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• Position and tighten the screw (3).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Transmission oil line on holder
  M6	Tightening torque	4 Nm

• Guide in and install wiring harness section (3) of the supply module.
• Tighten down screw (1).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Grounding cable to transmission
  M6	Tightening torque	8 Nm

• Connect connectors (2) and lock.

  The connector (2) must engage audibly.

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• Install the ground strap (2).
• Tighten down screw (1).
  TIGHTENING TORQUES SPECIFICATION
  
  

  Ground strap to transmission or body
  M8	Tightening torque	19 Nm

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Follow-up work 

• Fasten the (partially removed) PROP SHAFT
• Install transmission CROSS MEMBER .
• Install the RETAINING PLATES .
• Install the HEAT SHIELDS
• Install the complete EXHAUST SYSTEM .
• If installed: install the right and left TORSION STRUT where required.
• Install the tunnel connecting SUPPORTS .
• Install STARTER MOTOR .
• Reconnect all battery GROUND LEADS .
• Check/top up the automatic transmission OIL LEVEL .
• If the active stabilizer is installed: install fan COWL .
• Install rear UNDERBODY PROTECTION .
• Install the transmission side UNDERBODY PLANKING .
• Install the center UNDERBODY PROTECTION .
• Activate the 48 v ELECTRICAL SYSTEM .