Reverse Servo Assembly: Installation

WARNING: This page is about a different car, the 2002 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.

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.

Install the reverse servo return spring and piston.
- Do not install the piston cover.
  
  Fig 1: Installing Reverse Servo Return Spring And Piston
  Courtesy of FORD MOTOR CO.
Install the special tool and tighten the band apply bolt.

Fig 2: Installing Special Tool And Tightening Band Apply Bolt
Courtesy of FORD MOTOR CO.
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
  Courtesy of FORD MOTOR CO.
Loosen the bolt until the piston stops against the tool.

Fig 4: Loosening Bolt Until Piston Stops Against Tool
Courtesy of FORD MOTOR CO.
Verify that the amount of piston travel on the dial indicator is within specification.

Fig 5: Verifying Piston Travel
Courtesy of FORD MOTOR CO.
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
  Courtesy of FORD MOTOR CO.
Remove the dial indicator and servo selection tool.

Fig 7: Removing Dial Indicator And Servo Selection Tool
Courtesy of FORD MOTOR CO.
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 Correct Reverse Servo Assembly
  Courtesy of FORD MOTOR CO.
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 Servo Retaining Ring
  Courtesy of FORD MOTOR CO.
Install the main control valve body. For additional information, refer to MAIN CONTROL VALVE BODY .