Ford 2003 Mustang Workshop Manual page 2721

2. Assemble the gear shifter forks.
1. Install the gear shift plate into the gear shifter fork.
2. Install the gear shift fork inserts.
3. NOTE: Position the narrow side of the C-shaped gear selector interlock sleeve in the case
cover slot. Position the roll pin hole in the selector body toward the rear of the cover.
Install the gear selector interlock sleeve and the selector body as an assembly.
4. Lubricate the main shift control shaft with petroleum jelly.
5. NOTE: The 1-2 gear shifter fork is the larger shifter fork. The gear shifter fork offset lever must
face the cover. Position the gear shift plate attached to the 3-4 gear shifter fork under the gear
shift plate attached to the 1-2 gear shifter fork.
Position the gear shifter forks and the main shift control shaft in the cover.
Slide the shaft through the cover and shift the components until the shaft stops against
the cover.
6. CAUTION: Install the pin slightly below the selector body surface. Failure to
countersink the pin may result in interference between the pin and the gear selector
interlock sleeve during shifts.