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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.
      Fig 1: Installing Reverse Band Servo Spring
      G03882523Courtesy of FORD MOTOR CO.
  2. Install the special tool and tighten the band apply bolt.
    Fig 2: Tightening Band Bolt
    G03888638Courtesy of FORD MOTOR CO.
  3. Attach the special tool to the transmission.
    • Position the indicator stem on the flat portion of the reverse servo piston and zero the dial indicator.
      Fig 3: Attaching Special Tool To Transmission
      G03888639Courtesy of FORD MOTOR CO.
  4. Loosen the bolt until the piston stops against the tool.
    Fig 4: Loosening Bolt
    G03888640Courtesy of FORD MOTOR CO.
  5. Verify the amount of piston travel on the dial indicator is within specification.
    Fig 5: Identifying Piston Travel On Dial Indicator
    G03888641Courtesy 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
      Fig 6: Identifying Servo Piston Travel
      G03930084Courtesy of FORD MOTOR CO.
  7. Remove the dial indicator and servo selection tool.
    Fig 7: Removing Dial Indicator And Servo Selection Tool
    G03882529Courtesy 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.
      Fig 8: Installing Reverse Band Servo Spring
      G03888644Courtesy of FORD MOTOR CO.
  9. Using the special tool, install the reverse servo retaining ring.
    1. Compress the servo spring.
    2. Install the reverse band servo retaining ring.
      Fig 9: Removing/Installing Reverse Band Servo Retaining Ring Using Special Tool
      G03963989Courtesy of FORD MOTOR CO.
  10. Install the main control valve body. For additional information, refer to MAIN CONTROL VALVE BODY .
    11. WARNING: If equipped with fire suppression system, repower the system. For important safety warnings and procedures, refer to FIRE SUPPRESSION SYSTEM .
  11. If equipped with fire suppression system, repower the system.
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