Ford 2003 Mustang Workshop Manual page 2804

16. Remove the snap ring, then using the special tool, press off the first/second gear synchronizer.
Assembly
1. Carry out the following before reassembling:
Inspect the gears for broken or cracked teeth. Check for unusual wear patterns.
Inspect the thrust washers for face wear, cracks, scoring and for signs of heat damage.
Inspect the bearings, bearing cups and the synchronizers for wear or damage.
Inspect the output shaft for scoring or worn or damaged splines. Install new components
as necessary.
2. Lubricate all components with the recommended transmission fluid when reassembling.
3. NOTE: Position the output shaft with the output end facing upward.
NOTE: Install the synchronizer assembly with the deeper center flange of the synchronizer hub
facing toward the rear of the output shaft.
Install the first/second synchronizer assembly on the output shaft, then install a new retaining
ring.
It may be necessary to press the hub into position on the shaft.