F 150 2WD Pickup V8-4.6L SOHC VIN W (1998)
Torque Converter: Testing and Inspection
Operation Test
This test verifies that the Torque Converter Clutch (TCC) control system and the torque converter are operating properly.
1. Perform Quick Test. Check for Diagnostic Trouble Codes (DTCs). Refer to Diagnostic Trouble Code Chart. See: Transmission Control
Systems/Testing and Inspection
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 (OD) 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
Torque Converter Operation Concerns in the Diagnosis by Symptom Index. See: Transmission Control Systems/Testing and Inspection
6. If the vehicle stalls in (OD) or MANUAL 2 at idle with vehicle at a stop, move the Transmission Range (TR) selector lever to MANUAL 1
position. If the vehicle stalls, refer to Torque Converter Operation Concerns in the Diagnosis by Symptom Index. Repair as required. If the vehicle
does not stall in (OD), refer to Diagnosis by Symptom. See: Transmission Control Systems/Testing and Inspection
