Torque Converter Diagnosis

WARNING: This page is about a different car, the 2003 Ford RV Cutaway, 2003 Ford Econoline, 2003 Ford E550 Super Duty, 2003 Ford E450 Super Duty, and 2003 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.

Prior to installing a new or remanufactured torque converter, all diagnostic procedures must be followed. This is to prevent the unnecessary installation new or remanufactured torque converters. Only after a complete diagnostic evaluation can the decision be made to install a new or remanufactured torque converter.

Begin with the normal diagnostic procedures as follows:

Preliminary Inspection.
Know and Understand the Customer's Concern.
Verify the Concern-Carry out the TORQUE CONVERTER CLUTCH OPERATION TEST .
Carry out Diagnostic Procedures.
- Run on-board diagnostics; refer to ON-BOARD DIAGNOSTICS WITH DIAGNOSTIC TOOL .
  - Repair all non-transmission-related DTCs first.
  - Repair all transmission DTCs.
  - Rerun on-board diagnostics to verify repair.
- Carry out LINE PRESSURE TEST .
- Carry out STALL SPEED TEST .
- Carry out DIAGNOSTIC ROUTINES .
  - 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.