Transmission performance may be influenced by one, or more of the following items:
| • | Fluid level high/low. |
| • | Engine performance. |
| • | Manual linkage adjustment. |
| • | Internal fluid leaks. |
| • | Electrical system. |
| • | Transmission or other mechanical component. |
| • | Vacuum Modulator System |
These items should be checked and corrected, if necessary, before attempting transmission diagnosis.