F 250 2WD Pickup V8-5.4L CNG VIN M (1999)
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.