Component parts of heavy truck Hongyan gearbox assembly

1. Gearbox Housing
2. Input Shaft
3. Output Shaft
4. Gears and Synchronizers
5. Shift Mechanism (Shift forks, shift rails, shift rods)
6. Bearings and Seals
7. Control Valve Body
8. Torque Converter or Clutch Assembly
9. Oil Pump and Filter
10. Transmission Control Unit (TCU)