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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.
    Fig 1: Installing Reverse Servo Return Spring And Piston
    G03929764Courtesy of FORD MOTOR CO.
  1. Install the reverse servo return spring and piston.
    • Do not install the piston cover.
  2. Install the special tool and tighten the band apply bolt.
    Fig 2: Installing Special Tool And Tightening Band Apply Bolt - With Torque Specification
    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 Until Piston Stops Against Tool
    G03888640Courtesy of FORD MOTOR CO.
  5. Verify the amount of piston travel on the dial indicator is within specification.
    Fig 5: Measuring Amount Of 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 Servo Assembly
    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 .
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