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TSB
97-11-11
  • TRANSMISSION - 4R70W - ERRATIC OR PROLONGED 1-2 SHIFT
  • TRANSMISSION - AODE - ERRATIC OR PROLONGED 1-2 SHIFT
Publication Date: MAY 27, 1997

FORD:
1992-1997 CROWN VICTORIA
1994-1997 MUSTANG, THUNDERBIRD
LINCOLN-MERCURY:
1992-1997 GRAND MARQUIS, TOWN CAR
1993-1997 MARK VIII
1994-1997 COUGAR
LIGHT TRUCK:
1994-1997 ECONOLINE, F-150
1996-1997 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.

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