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TSB Main Page
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| TSB
03-21-12 |
- STALL - WHEN REVERSE AND/OR MANUAL LOW ARE SELECTED - (DTC) P1728 - OVERDRIVE CANCEL LAMP ILLUMINATED - 7.3L DIT ENGINE - VEHICLES WITH E40D TRANSMISSION - VEHICLES BUILT PRIOR TO 9/20/95
- TRANSMISSION - E40D - 7.3L DIT ENGINE - OVERDRIVE CANCEL LAMP ILLUMINATED, (DTC) P1728, AND WHEN REVERSE AND/OR MANUAL LOW ARE SELECTED - VEHICLES BUILT PRIOR TO 9/20/95
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| Publication Date: October 6, 2003 |
| FORD: | 1995-1996 E-350, F SUPER DUTY, F-250, F-350 |
Article 96-10-14 is being republished and updated as part of a consolidated 7.3L diagnostic aid booklet. ISSUE:
On vehicles with transmission build dates prior to 9/20/95, the overdrive cancel lamp may be illuminating and Diagnostic Trouble Code (DTC) P1728 present and/or engine stall when reverse and/or manual low is selected may occur on some vehicles. This could be caused by the torque converter hub contacting the cover which may generate metallic and/or friction material particles causing control valves to stick and/or damage the fluid pump. Damage to the fluid pump may cause the converter clutch to engage intermittently.
ACTION:
Replace front pump assembly and/or torque converter if damage or wear is present. Refer to the following Service Procedure for the proper action to use to correct the concern identified.
SERVICE PROCEDURE
OVERDRIVE CANCEL LAMP IS ILLUMINATED AND DTC P1728 IS PRESENT
- Verify proper transmission function by performing diagnostic procedures as specified in the appropriate Service Manual, Page 07-01A-43, then Page 07-01A-94 for DTC P1728 and service as required.
- If DTC P1728 is still present, examine the front pump assembly for internal damage. Examine gear pockets and stator support for wear. Check for stuck pump valves. Replace pump only if damage or wear is present.
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