Transmission Fluid Condition Check

6F50

Preliminary Inspection





The following items must be checked prior to beginning the diagnostic procedures.


Verification of Condition

This provides information which must be used in both determining the actual cause of customer concerns and carrying out the appropriate procedures.

The following procedures must be used when verifying customer concerns for the transmission.

Determine Customer Concern

NOTE: Some transaxle conditions may cause engine concerns. An electronic pressure control short circuit can cause engine misfiring. The Torque Converter Clutch (TCC) not disengaging will stall the engine.

Determine customer concerns relative to vehicle use and dependent driving conditions, paying attention to the following items:

- Hot or cold vehicle operating temperature
- Hot or cold ambient temperatures
- Type of terrain
- Vehicle loaded/unloaded
- City/highway driving
- Upshift
- Downshift
- Coasting
- Engagement
- Noise/vibration - check for dependencies, either rpm dependent, vehicle speed dependent, shift dependent, gear dependent, range dependent or temperature dependent.


Transmission Fluid Condition Check

1. Check the transmission fluid level.

2. Observe the color and the odor. The color under normal circumstances should be dark reddish, not brown or black or have a burnt odor.

3. Hold the transmission fluid level indicator over a white facial tissue and allow the transmission fluid to drip onto the facial tissue and examine the stain.

4. If evidence of solid material is found, the transmission fluid pan should be removed for further inspection.

5. If the stain is a foamy pink color, this may indicate coolant in the transaxle. The engine cooling system should also be inspected at this time.

6. If transmission fluid contamination or transaxle failure is confirmed by the sediment in the transmission fluid, the transaxle must be disassembled and completely cleaned. This includes the torque converter, cooler bypass valve, coolers and cooler tubes.

7. Carry out diagnostic checks and adjustments, refer to Diagnosis By Symptom Diagnosis By Symptom.