Installing the 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
  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 fitting sleeves (1) for damage and, if necessary, replace them.
• Check the correct fit of fitting sleeves (1).

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• Install the line (2).
• Secure clamps (1).

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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.
• 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 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 screws (1) and (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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• Feed in and install the wiring harness section (3) of the transmission wiring harness.
• Connect connectors (1) and lock.

  The connector (1) must engage audibly.

• Tighten down screw (2).
  TIGHTENING TORQUE SPECIFICATION
  
  

  Grounding cable/wiring harness section to transmission
  BM6	Tightening torque	8 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.
  (GA8H P50Z/GA8H P51Z/GA8H P75Z/GA8H)
• Slide connector (1) in the arrow direction and lock it by turning it.

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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.
• Tighten down screw (1).
  TIGHTENING TORQUE SPECIFICATION
  
  

  Ground strap to transmission or body
  M8	Tightening torque	19 Nm

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