A/T - AODE Extended Shift/Tip In Bump/Firm 3-4 Shift
Article No.93-7-6
03/31/93
^ TRANSMISSION - AODE - 4-3 "COAST TIP-IN BUMP" - VEHICLES BUILT AFTER 11/1/91
^ TRANSMISSION - AODE - OCCASIONAL FIRM 3-4 SHIFT - VEHICLES BUILT AFTER 11/1/91
^ TRANSMISSION - AODE - PERCEIVED ENGINE RPM INCREASE DURING ACCELERATION - VEHICLES BUILT AFTER 11/1/91
LINCOLN-MERCURY:
1992 TOWN CAR
CALIBRATION:
2-18D-R05, 2-18E-R05, 2-18R-R05, 2-18S-R05, 2-18J-R05, 2-18Q-R05
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:
The AODE Transmission may exhibit the following concerns:
^ 4-3 "Coast Tip-In Bump" - This concern occurs during 4-3 coasting down shifts. When the accelerator pedal is depressed, engine speed increases and a drive line "bump" may be felt.
^ Occasional Firm 3-4 Shift - This condition is caused by the torque converter clutch being engaged before the 3-4 shift is completed.
^ Perceived Extended Shift - This occurs during acceleration when the accelerator is suddenly released. Normal torque converter clutch disengagement may be observed as increased engine speed.
The above concerns may be caused by the operating strategy of the powertrain control module.
ACTION:
Replace the existing powertrain control module with a a new module which has a revised shift and converter clutch calibration. Refer to the 1992 Town Car Service Manual, Section 07-01A, for service details.
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.
PART NUMBER PART NAME CLASS
F2PZ-12A650-APA Powertrain Control Module B
(2-18D-R05)
F2PZ-12A650-ARA Powertrain Control Module B
(2-18E-R05)
F2PZ-12A650-ASA Powertrain Control Module W
(2-18R-R05)
F2PZ-12A650-ATA Powertrain Control Module B
(2-18S-R05)
F2PZ-12A65O-AUA Powertrain Control Module B
(2-18J-R05)
F2PZ-12A650-AVA Powertrain Control Module W
(2-180-R05)
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS:
Eligible Under Bumper To Bumper Warranty Coverage
OPERATION DESCRIPTION TIME
930706A Road Test And Replace 0.6 Hr.
Powertrain Control Module (PCM)
DEALER CODING
BASIC PART NO. CONDITION CODE
DRIVE 08
OASIS CODES:
501000, 502000, 504000, 597997