A/T - AODE Shifting Concerns/TCC Engagement
Article No.93-12-11
06/09/93
^ TRANSMISSION - AODE - EARLY TORQUE CONVERTER CLUTCH ENGAGEMENT AT "LIGHT THROTTLE" PRODUCES LUGGING AND SHIFT BUSYNESS - ALL VEHICLES EXCEPT 2.73 AXLES BUILT BEFORE 11/16/92
^ TRANSMISSION - AODE - OCCASIONAL HARSH 3-4 SHIFT - ALL VEHICLES EXCEPT 2.73 AXLES BUILT BEFORE 11/16/92
^ TRANSMISSION - AODE - SHIFT BUSYNESS DURING TORQUE CONVERTER CLUTCH ENGAGEMENT/DISENGAGEMENT AFTER 2-3 OR 3-4 SHIFTS - ALL VEHICLES EXCEPT 2.73 AXLES BUILT BEFORE 11/16/92
^ TRANSMISSION - AODE - SHIFT BUSYNESS ON GRADES WITH SPEED CONTROL "ON" - ALL VEHICLES EXCEPT 2.73 AXLES BUILT BEFORE 11/16/92
^ TRANSMISSION - AODE - SLIGHT INCREASE IN ENGINE RPM DURING TORQUE CONVERTER CLUTCH DISENGAGEMENT - ALL VEHICLES EXCEPT 2.73 AXLES BUILT BEFORE 11/16/92
FORD:
1993 CROWN VICTORIA
LINCOLN-MERCURY:
1993 GRAND MARQUIS, TOWN CAR
This TSB article is being republished in its entirety to correct the warranty status statement.
CALIBRATION:
3-18G-R00, 3-18G-R10, 3-18H-R00, 3-18H-R10, 3-18I-R00, 3-18I-R10, 3-18M-R00, 3-18M-R10, 3-18N-R00, 3-18N-R10, 3-18D-R00, 3-18D-R10, 3-18E-R00, 3-18E-R10, 3-18J-R00, 3-18J-R10, 3-18R-R00, 3-18R-R10, 3-18Q-R00, 3-180-R10, 3-18S-R00, 3-18S-R10
WARNING:
THIS MODIFICATION IS AUTHORIZED ONLY FOR THE LISTED ENGINE. PERFORMING THIS MODIFICATION ON OTHER ENGINE CALIBRATIONS IS UNAUTHORIZED AND COULD CREATE LIABILITY UNDER APPLICABLE FEDERAL OR LOCAL LAWS.
ISSUE:
Customer concerns with torque converter engagement and disengagement scheduling may be associated with one or more of the following symptoms.
^ Occasional harsh 3-4 shifts
^ Slight increase in engine RPM during torque converter clutch disengagement
^ Shift busyness during torque converter clutch engagement/disengagement after 2-3 or 3-4 shifts
^ Early torque converter clutch engagements at "Light Throttle" produces lugging and shift busyness
^ Shift busyness on grades with speed control "ON"
These concerns are caused by the powertrain control module programming.
ACTION:
Replace production powertrain control modules with service powertrain control modules. Refer to the Powertrain Control Module Charts for correct parts usage.
The "R11" calibrations will influence shift speeds. To assist in diagnostics, refer to the Shift Speed Charts shown in Figures 1 through 5.
Obtain an Authorized Modifications Decal and list the date, dealer number, and summary of alterations performed. Select a prominent place adjacent to the Vehicle Emission Control Information Decal suitable for installing the Authorized Modifications Decal. Clean the area, install the decal, and cover it with a clear plastic decal shield.
PARTS BLOCK
OTHER APPLICABLE ARTICLES: NONE
SUPERSEDES: 93-10-6
WARRANTY STATUS:
Eligible Under Bumper To Bumper Warranty Coverage
OPERATION DESCRIPTION TIME
931211A Test Drive, Remove And 0.9 Hr.
Replace PCM And Road
Test - Crown Vic/Grand
Marquis
931211B Test Drive, Remove And 1.0 Hr.
Replace PCM And Road
Test - Town Car
DEALER CODING
BASIC PART NO. CONDITION CODE
RECAL 08
OASIS CODES: 501000, 503000, 504000