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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
      G04628326Courtesy of FORD MOTOR CO.
  2. Install the special tool and tighten the band apply bolt.
    • Tighten to 5.6 N.m (50 lb-in).
      Fig 2: Locating Band Apply Bolt
      G04628327Courtesy 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
      G04628328Courtesy of FORD MOTOR CO.
  4. Loosen the bolt until the piston stops against the tool.
    Fig 4: Loosening Bolt Until Piston Stops Against Tool
    G04628329Courtesy of FORD MOTOR CO.
  5. Verify that the amount of piston travel on the dial indicator is within specification.
    Fig 5: Checking Piston Travel
    G04628330Courtesy 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 Specification
      G04628331Courtesy of FORD MOTOR CO.
  7. Remove the dial indicator and servo selection tool.
    Fig 7: Locating Dial Indicator & Servo Selection Tool
    G04628332Courtesy 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: Identifying Reverse Band Servo Cover
      G04628333Courtesy 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: Installing Reverse Band Servo Retaining Ring
      G04628334Courtesy of FORD MOTOR CO.
  10. Install the main control valve body. For additional information, refer to MAIN CONTROL VALVE BODY .
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