Explorer 2WD V6-4.0L (2009)
See: Transmission Control Systems/Testing and Inspection/Diagnostic Trouble Code Descriptions/5R55S.
2. Connect a scan tool to the vehicle and monitor engine rpm.
3. Bring the engine to normal operating temperature by driving the vehicle at highway speeds in the (D) position.
4. After normal operating temperature is reached, maintain a constant vehicle speed of about 80 km/h (50 mph) and tap the brake pedal with the left
foot.
5. The engine rpm should increase when the brake pedal is tapped and decrease about 5 seconds after the pedal is released. If this does not occur,
refer to Torque Converter Operation Concerns in Diagnosis By Symptom See: Transmission Control Systems/Testing and Inspection/Symptom
Related Diagnostic Procedures/5R55S/Diagnosis By Symptom.
6. If the vehicle stalls in (D) or MANUAL 2 at idle with the vehicle stopped, move the selector lever to MANUAL 1 position. If the vehicle stalls,
refer to Diagnosis By Symptom See: Transmission Control Systems/Testing and Inspection/Symptom Related Diagnostic
Procedures/5R55S/Diagnosis By Symptom, Torque Converter Operation Concerns. Repair as necessary. If the vehicle does not stall in (D), refer
to Diagnosis By Symptom See: Transmission Control Systems/Testing and Inspection/Symptom Related Diagnostic Procedures/5R55S/Diagnosis
By Symptom.
Torque Converter Contamination Inspection
Torque Converter Contamination Inspection
1. A new or remanufactured torque converter must be installed if one or more of the following statements is true:
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A torque converter malfunction has been determined based on complete diagnostic procedures.
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The torque converter stud or studs, impeller hub or bushing are damaged.
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The torque converter exhibits external discoloration (due to overheating).
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There is evidence of transmission assembly or fluid contamination due to the following transmission or converter failure modes.
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Major metallic failure
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Multiple clutch plates or band failures
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Sufficient component wear which results in metallic contamination
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Water or antifreeze contamination
2. If none of the above conditions are present, continue with the following fluid inspection.
3. Pour a small amount of transmission fluid from the torque converter onto an absorbent white tissue or through a paper filter.
4. Examine the fluid for contaminants, color and smell. The fluid must be free of contaminants, red in color and not have a burnt smell.
5. NOTICE: Do not use water-based cleaners or mineral spirits to clean or flush the torque converter or transmission damage will occur.
If the fluid passed inspection:
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drain the remaining fluid from the torque converter.
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using only the recommended transmission fluid, add 1.9L (2 qt) of clean fluid into the converter and agitate by hand.
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thoroughly drain the fluid.
