Econoline E350 1 Ton V8-5.4L SOHC VIN L (1999)
Stator to Turbine Interference Check
1. Position the torque converter with the converter hub up.
2. Install a pump stator support, engaging the mating splines of the stator support shaft.
3. Install the input shafts, engaging the splines with the turbine hub.
4. Hold the stator support stationary and attempt to rotate the turbine with the input shafts.
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The turbine and lockup clutch assemblies should rotate in both directions, without any signs of interference or metallic scraping noise.
5. If interference exists, the stator front thrust washer may be worn, allowing the stator to hit the turbine. In such cases, the torque converter must be
replaced.
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Check the converter crankshaft pilot for nicks or damaged surfaces that could cause interference when installing the torque converter into the
crankshaft pilot. Check the converter front impeller hub for nicks or sharp edges that would damage the pump seal.
Torque Converter Clutch Operation Test
This test verifies that the torque converter clutch control system and the torque converter are operating properly.
1. Perform Quick Test. Check for DTCs; Refer to the Diagnostic Trouble Code Chart.
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. NOTE: Some applications (based on calibrations) may or may not disengage the torque converter clutch at road speeds, above 45 mph when
tapping on the brake. Some applications may or may not disengage the torque converter clutch at road speeds, above 45 mph with closed throttle.
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 Clutch Operation Concerns in the Diagnosis by Symptom Index.
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 Torque Converter Clutch Operation Concerns in the Diagnosis by Symptom Index. Repair as required. If the vehicle does not stall in
