FixVault
Home › Ford › 2008 › Crown Victoria Base, 4.6 V › Repair and Diagnosis › Transmission › Automatic Trans › Automatic Transmission › In-Vehicle Servicing › Reverse Servo Assembly › Installation

Reverse Servo Assembly: Installation

NOTE: This is not an ordinary installation procedure and does not compensate for band wear.
    NOTE: Lubricate the reverse piston seal to facilitate assembly and prevent damage to the seal.
  1. Install the reverse servo return spring and piston.
    • Do not install the piston cover.
    2. Fig 1: Installing Reverse Servo Return Spring And Piston
    GF0003521Courtesy of FORD MOTOR CO.
  2. Install the Servo Piston Installer and tighten the band apply bolt.
    • Tighten to 5.6 Nm (50 lb-in).
    3. Fig 2: Identifying Special Tool
    GF0003522Courtesy of FORD MOTOR CO.
  3. Attach the Dial Indicator Gauge with Holding Fixture to the transmission.
    • Position the Dial Indicator Gauge stem on the flat portion of the reverse servo piston and zero the Dial Indicator Gauge.
    4. Fig 3: Positioning Indicator Stem On Flat Portion Of Reverse Servo Piston And Zero Dial Indicator
    GF0003523Courtesy of FORD MOTOR CO.
  4. Loosen the bolt until the piston stops against the Dial Indicator Gauge.
    5. Fig 4: Loosening Bolt Until Piston Stops
    GF0003524Courtesy of FORD MOTOR CO.
  5. Verify the amount of piston travel on the Dial Indicator Gauge is within specification.
    6. Fig 5: Checking Piston Travel
    GF0003525Courtesy of FORD MOTOR CO.
  6. If piston travel is not within specification, select and install the correct servo piston assembly to bring the servo piston travel within specification.
    1. One groove
    2. Two groove
    3. Three groove
    7. Fig 6: Identifying Servo Piston Travel Specification
    GF0003526Courtesy of FORD MOTOR CO.
  7. Remove the Dial Indicator Gauge with Holding Fixture and servo selection tool.
    8. Fig 7: Locating Dial Indicator And Servo Selection Tool
    GF0003527Courtesy of FORD MOTOR CO.
  8. Install the correct reverse servo assembly.
    1. Install the reverse band servo spring.
    2. Install the reverse band servo piston and rod.
    3. Install the reverse band servo cover.
    9. Fig 8: Installing Correct Reverse Servo Assembly
    GF0003528Courtesy of FORD MOTOR CO.
  9. Using the Servo Piston Remover/Installer, install the reverse servo retaining ring.
    1. Compress the servo spring.
    2. Install the reverse band servo retaining ring.
    10. Fig 9: Installing Reverse Servo Retaining Ring Using Special Tool
    GF0003529Courtesy of FORD MOTOR CO.
  10. Install the main control valve body. For additional information, refer to Main Control Valve Body .
    11. WARNING: If the vehicle is equipped with a fire suppression system, repower the system. For important safety warnings and procedures, refer to FIRE SUPPRESSION SYSTEM article. Failure to follow these instructions may result in serious personal injury.
  11. If equipped with a fire suppression system, repower the system.
About FixVault