F 550 4WD Super Duty V10-6.8L VIN D (2004)
Torque Converter Operation Test
This test verifies that the torque converter clutch control system and the torque converter are operating correctly.
1. Carry out Quick Test, refer to On-Board Diagnostics with scan tool. Check for DTCs, refer to the Diagnostic Trouble Code Chart. See:
Transmission Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/4R100/Displaying & Reading Trouble
Codes/On-Board Diagnostics With Scan Tool
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. Engine rpm should increase when brake pedal is tapped and decrease about five seconds after pedal is released. If this does not occur, refer to
Diagnosis By Symptom - Torque Converter Clutch Operation Concerns. See: Transmission Control Systems/Testing and Inspection/Symptom
Related Diagnostic Procedures/4R100
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 Clutch Operation Concerns. 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/4R100
