Disassembly
Remove the spring pin and separate the gear and bushing.
Note: Do not reuse O-ring and spring pin.
Assembly
1. Install a new o-ring on the gear shaft and coat the o-ring with automatic transmission fluid.
2. Insert the gear into the hub and align the pin hole with the groove on the gear shaft.
3. Install a new spring pin in the bushing hole. When installing it, make sure that the slot of the pin is not facing the gear wheel.
4. Install a new o-ring into the outer groove of the bushing and apply automatic transmission fluid to the outer surface of the o-ring.