Reverse Servo Assembly

Special Tools:

Removal
1. Remove the main control valve body.





2. Use the Servo Piston Remover/Replacer to remove the reverse band servo retaining ring.
1. Compress the servo spring.
2. Remove the reverse band servo retaining ring.

NOTE: The length of the rod attached to the piston is graded for three different lengths. Therefore, they should not be installed in any transmission other than the transmission from which they were removed.





3. Remove the (A) reverse band servo cover , (B) reverse band servo piston and rod and (C) reverse band servo spring.

Installation

NOTE:
^ This is not an ordinary installation procedure and does not compensate for band wear.
^ Lubricate the reverse piston seal to facilitate assembly and prevent damage to the seal.





1. Install the reverse servo piston and return spring.
^ Do not install the piston cover.





2. Install the Servo Piston Selection Tool and tighten the band apply bolt.





3. Attach the Dial Indicator With Bracketry.
^ Position the indicator stem on the flat portion of the reverse servo piston and zero the dial indicator.





4. Loosen the bolt until the piston stops against the tool.





5. Verify the amount of piston travel on the dial indicator is within specification.





6. If piston travel is not within specification, select the proper servo assembly (A) one groove, (B) two groove or (C) three groove, to bring the servo piston travel within specification.





7. Remove the dial indicator and servo selection tool.





8. Install the proper servo piston assembly spring and the reverse servo piston cover and seal.





9. Use the Servo Piston Remover/Replacer to install the reverse servo retaining ring.
1. Compress the servo spring.
2. Install the reverse band servo retaining ring.
10. Install the main control valve body.