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TSB
98-5-8
  • LAMP - MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED - DIAGNOSTIC TROUBLE CODE (DTC) P0503 STORED IN MEMORY - 4X4 VEHICLES ONLY
  • TRANSMISSION - SHIFT CONCERNS AND/OR ERRATIC SPEEDOMETER OPERATION - MALFUNCTION INDICATOR LAMP (MIL) ILLUMINATED - 4X4 VEHICLES ONLY
Publication Date: MARCH 16, 1998

LIGHT TRUCK:
1997-1998 EXPEDITION, F-150, F-250 LD
1998 NAVIGATOR

This TSB article is being republished in its entirety to correct the parts listed.

ISSUE:

The Malfunction Indicator Lamp (MIL) may illuminate and Diagnostic Trouble Code (DTC) P0503 may be stored in memory. There may also be transmission shift concerns and/or erratic speedometer operation. This may be caused by the speedometer drive gear being loose on the transfer case output shaft.

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