Explorer 2WD V8-4.6L (2008)
Inspection/Component Tests and General Diagnostics/5R55S - Automatic Transaxle/Transmission/Torque Converter Operation Test
4. Carry out Diagnostic Procedures.
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Run on-board diagnostics. See On-Board Diagnostics with scan tool. Refer to 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 on-board diagnostic to verify repair.
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Carry out the Line Pressure Test. Refer to Special Testing Procedures. See: Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/5R55S - Automatic Transaxle/Transmission/Special Testing Procedures
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Carry out the Stall Speed Test. See: Transmission Control Systems/Testing and Inspection/Component Tests and General Diagnostics/5R55S -
Automatic Transaxle/Transmission/Stall Speed Test
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Carry out the Diagnosis by Symptom Index. 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 service as necessary before servicing the torque converter.
Torque Converter Operation Test
Torque Converter Operation Test
This test verifies that the torque converter clutch control system and the torque converter are operating correctly.
1. Carry out the Quick Test. See On-Board Diagnostics with Scan Tool. Refer to Diagnostics. Check for DTCs. Refer to the Diagnostic Trouble
Code (DTC) Charts. See: Transmission Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview See: Transmission
Control Systems/Testing and Inspection/Diagnostic Trouble Code Descriptions
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. After normal operating temperature is reached, maintain a constant vehicle speed of about 80 km/h (50 mph) and tap 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/Diagnosis By Symptom
6. If the vehicle stalls in (D) or MANUAL 2 at idle with vehicle at a stop, move the transmission range selector lever to MANUAL 1 position. If the
vehicle stalls, refer to 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/Diagnosis
By Symptom
