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98-9-20
  • TRANSMISSION - E4OD - 4-1 DOWNSHIFT DURING A FORCED 4-2 DOWNSHIFT BETWEEN 88-105 KM/H (55-65 MPH) - VEHICLES BUILT THROUGH 12/22/97
Publication Date: MAY 11, 1998

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

ISSUE:

Some vehicles may experience a 4-1 downshift when performing a forced 4-2 downshift (kickdown) between 88-105 km/h (55-65 mph) causing the engine rpm to increase higher than expected. This may be caused by internal leakage of fluid between the hydraulic circuits in the transmission case worm trail between the separator plate gasket and transmission case.

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