1993 Lincoln Mark VIII V8-281 4.6L DOHC       Copyright c 1997, ALLDATA Corp.   1-888-968-3494 C2.00
Vehicle: All Technical Service Bulletins
AODE/4R70W Transmission Erratic or Prolonged 1-2 Shift
Article No.
97-11-11
05/27/97
^  TRANSMISSION - 4R70W - ERRATIC OR
   PROLONGED 1-2 SHIFT
^  TRANSMISSION - AODE - ERRATIC OR
   PROLONGED 1-2 SHIFT
FORD:
1992-97 CROWN VICTORIA
1994-97 MUSTANG, THUNDERBIRD
LINCOLN-MERCURY:
1992-97 GRAND MARQUIS, TOWN CAR
1993-97 MARK VIII
1994-97 COUGAR
LIGHT TRUCK:
1994-97 ECONOLINE, F-150
1996-97 EXPLORER
1997 EXPEDITION, MOUNTAINEER
ISSUE:
Some vehicles may exhibit an erratic or prolonged 1-2 shift. This may be caused by
early Accumulator Seal wear which may occur during repeated 1-2, 2-1 shift cycling.
The Accumulator side loads in the Case Accumulator Bore and causes the Case Bore to
become scuffed. Bore scuffing leads to premature seal wear and eventual intermediate
clutch pressure loss, which leads to the loss in 1-2 shift.
ACTION:
Replace the cast aluminum piston with the one-piece stamped steel piston with bonded
lip seals and replace the top Accumulator Spring. These revised parts allow for
increased durability. Refer to the following Service Procedure for details.
SERVICE PROCEDURE
NOTE:
   TRANSMISSION CASE REPLACEMENT IS NOT REQUIRED DUE TO 1-2 SHIFT ACCUMULATOR BORE
   SCUFFING. THE REVISED PISTON ASSEMBLY CAN BE USED WITH SCUFFED SEAL BORE.
1.   With the vehicle on a hoist, remove the transmission pan and gasket. Using the
     Snap Ring Removal Tool, remove the 1-2 Accumulator Piston Retainer. At this
     time, the spring load will pop the cover and bottom Accumulator Spring out of
     the bore.
2.   Remove the piston and top Accumulator Spring.
3.   Replace the piston and top Accumulator Spring with the new bonded Piston
     (F7AZ-7F251-AA) and spring (refer to Figure 1 for applications). If not damaged,
     reinstall the bottom Accumulator Spring and cover.
4.   Reinstall the retaining ring.
NOTE:
   DO NOT REUSE THE TRANSMISSION PAN GASKET IF IT IS DAMAGED.5.   Install the transmission pan and gasket.
Parts Block
OTHER APPLICABLE ARTICLES: NONE 
WARRANTY STATUS: Eligible Under The Provisions Of Bumper To Bumper Warranty Coverage
OPERATION       DESCRIPTION                  TIME
971111A         Replace 1-2 Accumulator      0.9 Hr.
                Components As Required
                (Includes Pan Removal
                And Installation) - All
                Vehicles
971111B         Add Time To Clean,           0.1 Hr.
                Inspect And Reuse Pan
                Gasket
971111C         Post Repair Road Test        0.3 Hr.
DEALER CODING
                                   CONDITION
BASIC PART NO.                       CODE
7F249                                 70
OASIS CODES: 501000, 502000, 503000, 504000, 590000