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Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 128 (Automatic Transmission) >> In-Vehicle Servicing >> Overdrive Servo >> Removal

Overdrive Servo: Removal

WARNING: This page is about a different car, the 2009 Mercury Grand Marquis and 2009 Ford Crown Victoria. However, it is still accessible from the selected car via links, so may be relevant.
    WARNING: Before servicing a vehicle equipped with a fire suppression system, depower the system by following the procedure in FIRE SUPPRESSION SYSTEM article. Failure to follow the instructions may result in serious personal injury.
  1. Remove the main control valve body. For additional information, refer to Main Control Valve Body e.
    2. NOTE: If the tool is not available, extreme care must be taken. Spring pressure will force the Overdrive (O/D) servo piston assembly out of case. Case bore damage may result from trying to pry on the O/D servo internal retaining ring.
  2. Using the Servo Piston Remover/Installer, compress the servo spring to remove the O/D servo retaining ring.
    3. Fig 1: Locating Overdrive Servo Piston Retaining Ring
    GF0003530Courtesy of FORD MOTOR CO.
  3. Remove the O/D servo piston and return spring.
    4. Fig 2: Removing Overdrive Servo Piston And Return Spring
    GF0003531Courtesy of FORD MOTOR CO.
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