LEMON Manuals: Even more car manuals for everyone
Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 727 (Automatic Transmission - 5R110W) >> Diagnosis & Testing >> Torque Converter Diagnosis

Torque Converter Diagnosis

WARNING: This page is about a different car, the 2004 Ford RV Cutaway, 2004 Ford Econoline, 2004 Ford E450 Super Duty, and 2004 Ford Cutaway. 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 installation of new or remanufactured torque converters. Only after a complete diagnostic evaluation can the decision be made to install new or remanufactured torque converters.

Begin with the normal diagnostic procedures as follows:

  1. Preliminary Inspection.
  2. Know and Understand the Customer's Concern.
  3. Verify the Concern - Carry out the Torque Converter Clutch Operation Test in this article.
  4. 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.

    TORQUE CONVERTER OPERATION TEST 

    This test verifies that the torque converter clutch control system and the torque converter are operating correctly.

  5. Carry out Quick Test, refer to ON-BOARD DIAGNOSTICS WITH DIAGNOSTIC TOOL . Check for DTCs. Refer to the DIAGNOSTIC TROUBLE CODE CHART .
  6. Connect a tachometer to the engine.
  7. Bring the engine to normal operating temperature by driving the vehicle at highway speeds for approximately 15 minutes in (D) position.
  8. 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.
  9. Engine RPM should increase when brake pedal is tapped and decrease about 5 seconds after pedal is released. If this does not occur, refer to DIAGNOSIS BY SYMPTOM  - Torque Converter Clutch Operation Concerns.
scientia non olet · About LEMON Manuals