Synchronizer Hub: Service and Repair

DISASSEMBLY
Place synchronizer in a clean shop towel and wrap. Press on inner hub. Carefully open up shop towel and remove springs, balls, keys, hub, and sleeve.

ASSEMBLY
1. Position synchronizer hub onto a suitable holding fixture (input shaft). The synchronizer hubs are directional. The hubs must be installed with the U facing upward.

Fig. 135:

2. Install springs into hub slot (Fig. 135)
3. Insert key into hub and spring.

Fig. 136:

4. Apply petroleum jelly to the hole in the key. Insert balls into each key (Fig. 136).

Fig. 137:

5. Slide sleeve over the hub and depress balls as you carefully slip the sleeve into position (Fig. 137).

Fig. 138:

6. Line up stop ring tang over the keys in the hub (Fig. 138). Install stop rings. Center the keys and balls by pushing on both stop rings.