Econoline E350 1 Ton V8-5.4L CNG VIN M (1999)
(D). refer to Diagnosis by Symptom Index.
Torque Converter Diagnosis
Prior to torque converter replacement, all diagnostic procedures must be followed. This is to prevent the unnecessary replacement of good torque
converters. Only after a complete diagnostic evaluation can the decision be made to replace the torque converter.
Begin with the normal diagnostic procedures as follows:
1. Preliminary Inspection.
2. Know and Understand the Customer's Concern.
3. Verify the Concern-Perform the Torque Converter Clutch Operation Test.
4. Perform Diagnostic Procedures.
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Run on-board 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 diagnostics to verify repair.
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Perform Line Pressure Test.
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Perform Stall Speed Test.
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Perform Diagnostic Routines.
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Use the Diagnosis by Symptom 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 repair as required, before repairing
the torque converter.
Torque Converter Leak Check
Special Tools
1. Clean the outside surface of the torque converter.
2. Install the Torque Converter Leak Check Tool and Gasket into the converter hub.
3. WARNING: Always follow proper safety procedures while using the press.
Install the torque converter with the installed leak check tool into the Arbor press.
Secure the press. Apply enough force from the press to seal the tool into the torque converter.