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Home >> Mercedes Benz >> 2025 >> S580 >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Automatic Transmission (1 Of 2) -- 223 Chassis >> Testing & Repair >> Detach/Attach Torque Converter Of Clutch Plate - AR27.20-P-0001-01EWM

Detach/Attach Torque Converter Of Clutch Plate - AR27.20-P-0001-01EWM

Transmission 725.0 

MODIFICATION NOTES

15.06.2022 Only turn engine at the center bolt of the crankshaft in the direction of engine rotation using the specified SPECIAL TOOL box wrench. Otherwise, damage to the engine or even failure of the engine may occur. Operation step 1.  
TORQUE CONVERTER

Number Designation Transmission 725.0/1
BA27.20-P-1001-01D Screw, torque converter/rotor to drive plate/star-shaped drive plate Angled threaded connection Stage 1 Nm 3
Stage 2 Nm 30
Stage 3 ∠° 90
Fig 1: Identifying Ring Wrench (177 589 00 03 00)
G11971950Courtesy of MERCEDES-BENZ USA
Fig 2: Identifying Long Wedge (115 589 03 59 00)
G07070400Courtesy of MERCEDES-BENZ USA
Fig 3: Identifying Socket Wrench Bit (001 589 65 09 00)
G09981907Courtesy of MERCEDES-BENZ USA
Fig 4: Identifying Counter Holder (654 589 00 40 00)
G11971953Courtesy of MERCEDES-BENZ USA

Remove 

  1. Unscrew screws/bolts (1 to 4) opposite direction of engine rotation (arrow) through opening in housing.

    NOTES

    Transmission 725.0 with engine 176

    Transmission 725.0 with engine 177

    Only turn engine at the center bolt of the crankshaft in the direction of engine rotation using the specified SPECIAL TOOL box wrench.

    Otherwise damage to the engine or even failure of the engine may occur.

    IMPORTANT

    Transmission 725.0 with engine 274, 264, 276, 278, 279, 642, 651

    Turn the engine further in the direction of engine rotation at the crankshaft center bolt using SPECIAL TOOL socket.

    Transmission 725.0 with engine 256, 654, 656

    Turn engine further in direction of engine rotation at vibration damper

    G11971954Courtesy of MERCEDES-BENZ USA

    of crankshaft using SPECIAL TOOL counterholder.

    If center bolt or vibration damper is not accessible,

    Turn the engine further at the torque converter using a wide screwdriver.

  2. Pry torque converter off drive plate using SPECIAL TOOL long wedge.

    Check 

  3. Check threaded inserts in drive plate for loose fitting and damage; replace drive plate if necessary.

    Install 

  4. Check whether torque converter is lying flat against drive plate.

    If necessary, press torque converter onto drive plate using SPECIAL TOOL long wedge.

  5. Tighten bolts (1 to 4) in numerical sequence TORQUE SPECIFICATION .

    IMPORTANT Replace the screws/bolts (1 to 4).