Technical Service Bulletins
|Publication Date: October 6, 2003|
|1995-1996 E-350, F-250 CREW CAB, F-350 CREW CAB|
Article 96-26-21 is being republished in its entirety as part of a consolidated 7.3L diagnostic aid booklet.
Some vehicles with transmissions built prior to 11/13/95 (5L13) may exhibit a driveline resonance/vibration between 1400 and 2000 RPM with the torque converter clutch engaged. This may be caused by the torque converter.
Prior to torque converter replacement, refer to the following Service Procedure for details to verify conditions.
- Verify the resonance/vibration does not occur in neutral and is most noticeable between 1400 and 2000 RPM with the converter clutch engaged during medium to heavy throttle conditions. Also watch for the vibration to diminish at engine speeds lower than 1400 and higher than 2000 RPM. If the concern meets all of these conditions and the transmission has a built date prior to 11/13/95 (5L13), replace the torque converter. Refer to the appropriate Service Manual for removal and installation procedures.
- If the vibration concerns do not meet the conditions, check for non-factory installed items that could affect driveline and verify proper installation. Also refer to the appropriate Service Manual, Section 05-00 for diagnosis and testing.
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