Ford 2003 Mustang Workshop Manual page 2511

14. Install the reverse clutch pressure plate retainer snap ring.
15. Install the special tool on the reverse clutch pack.
Push downward on the clutch pack.
Release pressure and zero the dial indicator.
16. Using the special tool check the reverse clutch pack clearance.
1. Lift up on the clutch pack until it fully seats against the reverse clutch pressure plate
retainer.
2. Read the dial indicator.
If clearance is not within specifications, install the correct size retaining ring.
Selective Retaining Rings
1.52-1.62 mm (0.060-0.064 inch)
1.87-1.98 mm (0.074-0.078 inch)
2.23-2.33 mm (0.088-0.092 inch)
2.59-2.69 mm (0.102-0.106 inch)
Specification