E 350 V8-6.0L DSL Turbo (2007)
Torque Converter: Testing and Inspection
Torqshift Automatic Transmission
Torque Converter Diagnosis
Torque Converter Diagnosis
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.
4. Carry out Diagnostic Procedures.
^
Run on-board diagnostics.
-
Repair all non-transmission-related DTCs first.
-
Repair all transmission DTCs.
-
Rerun on-board diagnostics to verify repair.
^
Carry out Line Pressure Test. See: Transmission Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Torqshift
Automatic Transmission/Line Pressure Test
^
Carry out Stall Speed Test. See: Transmission Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Torqshift
Automatic Transmission/Stall Speed Test
^
Carry out Diagnostic Routines. See: Transmission Control Systems/Testing and Inspection/Symptom Related Diagnostic Procedures/Torqshift
Automatic Transmission/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. See: Transmission Control Systems/Testing and Inspection/Symptom Related Diagnostic Procedures/Torqshift
Automatic Transmission/Diagnosis By Symptom
Torque Converter Operation Test
This test verifies that the torque converter clutch control system and the torque converter are operating correctly.
1. Carry out Quick Test. Check for DTCs. Refer to the Diagnostic Trouble Code Chart. See: Transmission Control Systems/Testing and
Inspection/Diagnostic Trouble Code Descriptions/Torqshift Automatic Transmission
2. Connect a tachometer to the engine.
3. Bring the engine to normal operating temperature by driving the vehicle at highway speeds for approximately 15 minutes in (D) position.
4. 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.
5. Engine rpm should increase when brake pedal is tapped and decrease about 5 seconds after pedal is released.
Torque Converter
Torque Converter
1. A new or remanufactured torque converter must be installed if one or more of these statements are true:
^
A torque converter malfunction has been determined based on the complete diagnostic procedures.
^
Converter stud(s), impeller hub or bushing is damaged.
^
Discoloration of the torque converter (due to overheating).
^
Evidence of transmission assembly or fluid contamination due to these transmission or converter failure modes:
-
Major metallic failure.
-
Multiple clutches or clutch plate failures.
-
Sufficient component wear which results in metallic contamination.
