Ford 2003 Mustang Workshop Manual page 2478

20. Using the special tool, remove the reverse band servo retaining ring.
21. Remove the reverse servo assembly.
1. Remove the reverse band servo cover.
2. Remove the reverse band servo piston and rod.
3. Remove the reverse band servo spring.
22. NOTE: If tool is not available, extreme care must be taken. Spring pressure will force overdrive
servo piston assembly out of case. Case bore damage may result from trying to pry on internal
retaining ring.
Using the special tool, compress the piston spring, then remove the overdrive servo piston
retainer.