Ford 2003 Mustang Workshop Manual page 2730

Assembly
1. Soak the blocking rings in transmission fluid for ten minutes.
Use MERCON® Multi-Purpose ATF Transmission Fluid XT-2-QDX or equivalent.
2. Assemble the first and second synchronizer.
1. Install the synchronizer hub insert springs and the synchronizer inserts into the
synchronizer hub.
2. Install the sliding sleeve onto the hub.
3. NOTE: If not done so previously, soak the blocking ring in MERCON® Multi-Purpose ATF
Transmission Fluid XT-2-QDX or equivalent for ten minutes.
NOTE: Align the slots in the synchronizer blocking ring with the tabs in the first and second
speed synchronizer.
Install the second speed synchronizer blocking ring and the inner and outer cones as an
assembly.
4. Install the second speed synchronizer thrust washer.
5. Using the special tool, install the output shaft bearing snap ring.