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

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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: Installing Special Tool
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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 Dial Indicator In Zero Positions
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Loosen the bolt until the piston stops against the tool.

Fig 4: Loosening Bolt
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Verify the amount of piston travel on the dial indicator is within specification.

Fig 5: Inspecting Dial Indicator Positions
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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 Assembly
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Remove the dial indicator and servo selection tool.

Fig 7: Removing Dial Indicator
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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 Correct Reverse Servo Assembly
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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
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Install the main control valve body. For additional information, REFER to MAIN CONTROL VALVE BODY .