Ford 2003 Mustang Workshop Manual page 2566

42. Install the 1-2 accumulator retaining ring.
43. NOTE: This is not an ordinary installation procedure and does not compensate for band wear.
When new piston and rod assembly installation becomes necessary, or when a new reverse
band has been installed, the reverse piston and rod length must be adjusted.
NOTE: Lubricate the reverse piston seal to facilitate assembly and prevent damage to the seal.
NOTE: Do not install the reverse servo piston cover and seal at this time.
Install the reverse servo piston and rod assembly.
44. Install the special tool.
Tighten the bolt.