Ford 2003 Mustang Workshop Manual page 2792

38. Remove the input shaft. For input shaft disassembly, refer to
section.
39. Remove the shift rails and shift forks from the main shaft. For gearshift rail and fork
disassembly, refer to
40. Remove the reverse idler shaft bolt. Remove and discard the seal.
Gearshift Rail and Fork
Input Shaft and Bearing
in this section.
in this