Torque Converter Diagnosis
WARNING: This page is about a different car, the 2002 Mercury Villager. However, it is still accessible from the selected car via links, so may be relevant.
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 install a new torque converter.
Begin with the normal diagnostic procedures as follows:
- Preliminary inspection.
- Know and understand the customer's concern.
- Verify the concern.
- Carry out diagnostic procedures:
- Check for DTCs.
- repair all non-transmission related DTCs first.
- repair all transmission DTCs.
- carry out Line Pressure Test; refer to LINE PRESSURE TEST .
- carry out Stall Speed Test; refer to STALL SPEED TEST .
- carry out Diagnostic Routines; refer to DIAGNOSIS BY SYMPTOM INDEX .
- use the 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.
- Check for DTCs.