Explorer 2WD V8-4.6L VIN 8 (2006)
Torque Converter: Testing and Inspection
6R60 Automatic Transmission
Torque Converter Diagnosis
Special tool
Special Tool(s)
Prior to torque converter installation, all diagnostic procedures must be followed. This is to prevent the unnecessary installation of good torque
converters.
Only after a complete diagnostic evaluation can the decision be made to install a new torque converter
Begin with the normal diagnostic procedures as follows:
1. Preliminary inspection.
2. Know and understand the customer's concern.
3. Verify the condition - carry out the torque converter operation test.
4. Carry out diagnostic procedures.
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Carry out on-board diagnostics; refer to Diagnostics. See: Transmission Control Systems/Testing and Inspection/Reading and Clearing
Diagnostic Trouble Codes/6R60 Automatic Transmission
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Repair all non-transmission related DTCs first.
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Repair all transmission DTCs.
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Rerun on-board diagnostics to verify repair.
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Carry out Stall Speed Test. See: Transmission Control Systems/Testing and Inspection/Component Tests and General Diagnostics/6R60
Automatic Transmission/Non-Trouble Code Procedures/Special Testing Procedures
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Carry out Diagnostic Routines. See: Transmission Control Systems/Testing and Inspection/Symptom Related Diagnostic Procedures/6R60
Automatic Transaxle/Transmission/Diagnostic Routines
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Use the Diagnosis by Symptom 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 changing
the torque converter. See: Transmission Control Systems/Testing and Inspection/Symptom Related Diagnostic Procedures/6R60 Automatic
Transaxle/Transmission/Diagnostic Routines
Torque Converter Operation Test
The Torque Converter Operation Test verifies that the torque converter clutch (TCC) control system and the torque converter are operating correctly.
1. Carry out Quick Test with diagnostic tool. Refer to Symptom Charts. Check for DTCs. See: Transmission Control Systems/Testing and
Inspection/Symptom Related Diagnostic Procedures/6R60 Automatic Transaxle/Transmission/Diagnosis By Symptom
2. Connect a diagnostic tool to the vehicle.
3. Bring the engine to normal operating temperature by driving the vehicle at highway speeds for approximately 15 minutes in D position.
4. After normal operating temperature is reached, maintain a constant speed of about 56 km/h (35 mph) in 5th gear for 10 seconds.
5. Release the accelerator pedal and monitor the diagnostic tool TP voltage to approximately 1.25 volts or 25 percent throttle.
6. Monitor the TCC and engine speed PID. The TCC should release and engine rpms should increase before the 5-4 shift occurs.
NOTE: The following is a list of common vehicle concerns that have been misdiagnosed as TCC shudder.
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Spark plugs - check for cracks, high resistance or broken insulators
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Plug wires
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Fuel injector - filter may be plugged
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Fuel contamination - engine driveability concerns
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Exhaust gas recirculation (EGR) valve - valve may let in too much exhaust gas and cause engine to run lean
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Vacuum leak - engine will not get correct air/fuel mixture
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Manifold absolute pressure (MAP)/mass air flow (MAF) sensor - incorrect air/fuel mixture
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Heated oxygen sensor (HO2S) - too rich/lean air/fuel mixture
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Fuel pressure - may be too low
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Engine mounts - loose/damaged mounts can cause vibration concerns
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Axle joints - check for vibration
