E 450 V10-6.8L (2008)
Torque Converter: Testing and Inspection
Torque Converter Diagnosis
4R70E/4R75E - Automatic Transaxle/Transmission
Torque Converter Diagnosis
Prior to torque converter installation, all diagnostic procedures must be followed. This is to prevent the unnecessary installation 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:
1. Preliminary Inspection See: Transmission Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Preliminary
Inspection
2. Know and understand the customer concern
3. Verify the condition - carry out the torque converter operation test See: Transmission Control Systems/Testing and Inspection/Component Tests
and General Diagnostics/Torque Converter Operation Test
4. Carry out diagnostic procedures
^
Carry out on-board diagnostics; refer to Diagnostics. See: Transmission Control Systems/Testing and Inspection/Initial Inspection and
Diagnostic Overview/Diagnostics
-
Repair all non-transmission related DTCs first.
-
Repair all transmission DTCs.
-
Rerun on-board diagnostic to verify repair.
^
Carry out Line Pressure Test. Refer to Special Testing Procedures. See: Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Line Pressure Test See: Transmission Control Systems/Testing and Inspection/Component Tests and General
Diagnostics/Special Testing Procedures
^
Carry out Stall Speed Test. Refer to Special Testing Procedures. See: Transmission Control Systems/Testing and Inspection/Component Tests
and General Diagnostics/Stall Speed Test See: Transmission Control Systems/Testing and Inspection/Component Tests and General
Diagnostics/Special Testing Procedures
^
Carry out Diagnostic Routines. Refer to Diagnosis By Symptom. See: Transmission Control Systems/Testing and Inspection/Symptom Related
Diagnostic Procedures/Symptoms
-
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. See: Transmission Control Systems/Testing and Inspection/Symptom Related
Diagnostic Procedures/Symptoms
Check each component listed; diagnose and repair as required before changing the torque converter.
Torqshift - Automatic Transaxle/Transmission
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. See: Transmission Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Preliminary
Inspection
2. Know and Understand the Customer's Concern.
3. Verify the Concern - Carry out the Torque Converter Clutch (TCC) Operation Test. See: Transmission Control Systems/Testing and
Inspection/Component Tests and General Diagnostics/Torque Converter Clutch (TCC) Operation Test
4. Carry out Diagnostic Procedures.
^
Run on-board diagnostics. Refer to On-Board Diagnostics with scan tool.
-
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/Line
Pressure Test
^
Carry out Stall Speed Test. See: Transmission Control Systems/Testing and Inspection/Component Tests and General Diagnostics/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. See: Transmission Control Systems/Testing and Inspection/Symptom Related Diagnostic Procedures/Symptoms
