Reverse Synchronizer
1. Scribe a mark on the synchronizer hub and on the sleeve. This will help you to reinstall the parts in the same position.
2. Remove the synchronizer spring. Use a small-bladed screwdriver.
3. Remove the synchronizer sleeve from the hub Press against the inner hub.
4. Turn the hub over. The keys will slide out from the hub.
5. Remove the following parts using a small-blade screwdriver:
a. The synchronizer key retainer
b. The synchronizer spring
6. Discard the synchronizer key retainer.