Ford 2003 Mustang Workshop Manual page 2520

1.52-1.62 mm (0.060-0.064 inch)
1.87-1.98 mm (0.074-0.078 inch)
2.24-2.34 mm (0.088-0.092 inch)
2.59-2.69 mm (0.102-0.106 inch)
16. NOTE: Make sure the scarf-cut seals are mated correctly.
Slide the two scarf-cut seals on the input shaft.
17. Install the two scarf-cut seals on the input shaft.
18. Install the No. 3 forward clutch hub front bearing and the forward clutch hub.