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 & Piston

Courtesy of FORD MOTOR CO.

Install the reverse servo return spring and piston.
- Do not install the piston cover.
Install the special tool and tighten the band apply bolt.

Fig 2: 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: Positioning Indicator
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Loosen the bolt until the piston stops against the tool.

Fig 4: Loosening Band Apply Bolt
Courtesy of FORD MOTOR CO.
Verify the amount of piston travel on the dial indicator is within specification.

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

Fig 7: Removing Indicator & Servo Selection Tool
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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
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, see MAIN CONTROL VALVE BODY .