Shock or Slip When Selecting P-R, N-R

1. Check engine idle speed.
2. Incorrect oil level.
3. Incorrect shift linkage adjustment.
4. Incorrect vacuum hose routing.
5. Abnormal hydraulic pressure.
6. Faulty vacuum diaphragm.
7. Faulty oil pump.
8. Faulty control valve.
9. Damaged low reverse brake.
10. Damaged front clutch.