For 1990-2009 cars

### Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. This step is to make sure the use of the proper transmission fluid. DEXRON® Vl fluid is used to Make sure proper synchroniser operation, and for sufficient lubrication. Improper fluid may cause the synchronisers to stick or cause overheating of the transmission components.

2. A static shift test is performed by shifting into all gears with the engine not operating. By confirming that the transmission can be shifted into all positions, Make sures that the shift lever is not excessively worn or damaged.

3. A dynamic shift test is performed by shifting into all of the gear positions with the engine operating. Test to Make sure that the internal shift components are properly functioning.

Step | Action | Yes | No
--- | --- | --- | ---
DEFINITION: The transmission cannot be shifted out of a gear or the vehicle will not move because the transmission is locked.
1 | Did you review and perform the necessary inspections? Refer to Transmission Replacement | Go to Step 2 | Go to Transmission Replacement.
2 | Inspect for the correct type of transmission fluid. Is the correct type of transmission fluid being used? | Go to Step 6 | Go to Step 5
3 | Drain and fill the transmission with the correct type of fluid. Refer to Transmission Fluid Replacement Did you find and repair the condition? | Go to Step 9 | Go to Step 6
4 |

1. Perform a static shift test on the transmission.
2. Test for the shift lever moving to all positions.

Were you able to shift into all positions?

Go to Step 6

Go to Step 5

5 |

1. Remove the shift lever. Refer to Shift Control Assembly Replacement.
2. Inspect for worn or faulty components.

Did you find and repair the conditions?

Go to Step 9

Go to Step 6

6 |

1. Perform a dynamic shift test on the transmission.
2. Test for being able to shift in and out of the gear with the concern.

Were you able to shift the transmission correctly?

Go to Step 7

Go to Step 8

7 |

1. Remove the transmission. Refer to Transmission Replacement.
2. Inspect the clutch system for the clutch not releasing properly. Refer to Clutch System Description and Operation

Did you find and repair the condition?

Go to Step 9

Go to Step 8

8 |

1. Disassemble the transmission. Refer to Transmission Disassemble.
2. Inspect the following transmission internal components for wear or damage:

• | The shift rail.

• | The internal shift control lever.

• | The synchroniser components for being broken or faulty.

• | The speed gears for being seized to the mainshaft.

Did you find and repair the conditions?

Go to Step 9

Go to Diagnostic Aids

9 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 1