Fulltext TSBs

Technical Service Bulletins

TSB
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.

ACTION:

Perform normal diagnostics as outlined in the appropriate Workshop Manual. If the concern is still present, replace the separator plate and gaskets. Refer to the Application Chart below and the appropriate Workshop Manual for replacement procedures.


APPLICATION
ApplicationSeparator PlateGasket
(Control-To-Plate)
Gasket
(Case-To-Plate)
5.4L, 7.3LF81Z-7A008-EA – 2 V-Notches, 1 Semi-CircleF81Z-7D100-ABF81Z-7C155-AA
    
6.8L – Vehicles Built Before 8/16/97F81Z-7A008-EA – 2 V-Notches, 1 Semi-CircleF81Z-7D100-ABF81Z-7C155-AA
    
6.8L – Vehicles Built From 8/16/97F8UZ-7A008-CA – 1 V-Notch, 2 Semi-CirclesF81Z-7D100-ABF81Z-7C155-AA


PART NUMBERPART NAME
F8UZ-7A008-CASeparator Plate
F81Z-7A008-EASeparator Plate
F81Z-7C155-AAGasket
F81Z-7D100-ABGasket

OTHER APPLICABLE ARTICLES:

98-9-21

WARRANTY STATUS:

Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage

OPERATIONDESCRIPTIONTIME
980920AReplace Separator Plate And Gasket2.1 Hrs.

DEALER CODING

BASIC PART NO.CONDITION CODE
7A008, 7D10042

OASIS CODES:

502000, 504000, 590000


Copyright © 1998 Ford Motor Company