Flex FWD V6-3.5L (2010)
Torque Converter: Testing and Inspection
Torque Converter Diagnosis
Torque Converter Diagnosis
Prior to torque converter installation, all diagnostic procedures must be followed. This is to prevent the unnecessary installation of new or
remanufactured torque converters. Only after a complete diagnostic evaluation can the decision be made to install a new or remanufactured torque
converter.
Begin with the normal diagnostic procedures as follows:
1. Preliminary inspection.
2. Know and understand the customer's concern.
3. Verify the concern - carry out the Torque Converter Clutch (TCC) Operation Test.
4. Carry out diagnostic procedures:
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Run On-Board Diagnostic (OBD). Refer to Diagnostics See: Transmission Control Systems/Testing and Inspection/Initial Inspection and
Diagnostic Overview/Diagnostics.
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Repair all non-transmission related DTCs first.
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Repair all transmission DTCs.
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Rerun OBD to verify repair.
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Carry out Line Pressure Test. See: Transmission Control Systems/Testing and Inspection/Component Tests and General
Diagnostics/Special Testing Procedures/Line Pressure Test Refer to Special Testing Procedures See: Transmission Control
Systems/Testing and Inspection/Component Tests and General Diagnostics/Special Testing Procedures.
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Carry out Stall Speed Test. See: Transmission Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Special
Testing Procedures/Stall Speed Test Refer to Special Testing Procedures See: Transmission Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Special Testing Procedures.
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Carry out diagnostic routines. See: Transmission Control Systems/Testing and Inspection/Symptom Related Diagnostic
Procedures/Diagnostic Routines Refer to Diagnosis By Symptom See: Transmission Control Systems/Testing and Inspection/Symptom
Related Diagnostic Procedures/Diagnosis By Symptom.
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Use the index to locate the appropriate routine that best describes the symptom(s). The routine will list all possible components that may
cause or contribute to the symptom. Check each component listed, diagnose and repair as required, before installing a new torque
converter.
Torque Converter Clutch (TCC) Operation Test
This test verifies that the TCC control system and the torque converter are operating correctly.
1. Carry out Self Test, refer to the tester manual. Check for DTCs.
2. Connect a tachometer to the engine.
3. Bring the engine to normal operating temperature by driving the vehicle at highway speeds for approximately 15 minutes in (D) position.
4. If the vehicle stalls in (D) at idle with vehicle at a stop, move the selector lever to manual L position. If the vehicle stalls, see Torque Converter
Operation Concerns, refer to Diagnosis By Symptom See: Transmission Control Systems/Testing and Inspection/Symptom Related Diagnostic
Procedures/Diagnosis By Symptom. Repair as required. If the vehicle does not stall in (D), refer to Diagnosis By Symptom See: Transmission
Control Systems/Testing and Inspection/Symptom Related Diagnostic Procedures/Diagnosis By Symptom.
