A/T - AOD Delayed Shift Times

91ford23

Article No. 91-16-12
08/07/91


TRANSMISSION - AUTOMATIC - AOD - DELAYED 3-4/4-3 SHIFTS OR OVERDRIVE BAND/FORWARD CLUTCH REPEAT REPAIRS



FORD: 1989-90 CROWN VICTORIA, MUSTANG, THUNDERBIRD

LINCOLN-MERCURY: 1989-90 COUGAR, GRAND MARQUIS, MARK VII, TOWN CAR

LIGHT TRUCK: 1989-90 BRONCO, E-150, E-250, F-150


This TSB article is being republished in its entirety to include Bronco and E-250 in the Light Truck application line.

ISSUE: Increased shift times may be experienced during certain continuous driving conditions. When frequent 3-4/4-3 shifts or high ambient temperatures are encountered, overdrive band engagement or release times may increase. This slip at the friction surface creates excessive heat and may eventually fail the band. Forward clutch failure may also occur as the forward clutch operation is synchronized with the overdrive band during 3-4/4-3 shifting.

ACTION: Whenever servicing the overdrive band or forward clutch, also replace the main control assembly with a 1991 service main control. Refer to the following AOD Main Control Application Chart. This chart reflects shift calibration revisions to the 1991 main control level.

AOD MAIN CONTROL COMPLEXITY CHART

MAIN DELETE
ADD SERVICE CONTROL SERVICE PART
PART NO. I.D. NO. MAIN CONTROL I.D.

F1TZ-7A100-C GNO F0TZ-7A100-G DOA, MPA
E9TZ-7A100-J MRA
F1TZ-7A100-B GNN F0TZ-7A100-F DOX, MPX
E9TZ-7A100-H MRX
F1AZ-7A100-D JNF E9AZ-7A100-B COH, VPH, VRH, RRH
F1SZ-7A100-B BNJ E9SZ-7A100-B URL, URY, SRY
F0SZ-7A100-B GPJ, UPJ
F1AZ-7A100-E JFK F0AZ-7A100-D CJH
E9AZ-7A100-G VGH, RGH, WFR
E5AZ-7A100-D BER, OER, ODR
F1LY-7A-A DNX F0LY-7A100-B BOC, BOX, PPC
E9LY-7A100-A PRX
E9LY-7A100-B PRC
F1SZ-TA100-A ANV F0SZ-7A100-A TPM
E9SZ-7A100-D TRM, TRF


PART NUMBER PART NAME CLASS

F1TZ-7A100-C Main Control B
F1TZ-7A100-B Main Control B
F1AZ-7A100-D Main Control B
F1SZ-7A100-B Main Control C
F1AZ-7A100-E Main Control C
F1LY-7A100-A Main Control B
F1SZ-7A100-A Main Control C

OTHER APPLICABLE ARTICLES: NONE
SUPERSEDES: 91-5-6
WARRANTY STATUS: Eligible Under Basic Warranty Coverage, Major Component Warranty Coverage, Powertrain Warranty Coverage
OPERATION DESCRIPTION TIME
911612A Replace Main Control Valve 0.6 Hr.
Body To AOD - Cars
911612B Remove And Install AOD 3.1 Hr.
Transmission Assembly -
Crown Victoria, Grand
Marquis And Town Car
911612C Remove And Install AOD 3.5 Hr.
Transmission Assembly -
Thunderbird, Cougar,
Mustang And Mark VII
911612D Overhaul Time For AOD 4.9 Hr.
Transmission
911612E Remove And Install 2.8 Hr.
Transmission - F-150, 4X2
Models, E-150, E-250
911612F Remove And Install 4.4 Hr.
Transmission - F-150 And
Bronco, 4X4 Models
911612G Remove And Install 2.6 Hr.
Transmission - Econoline
911612H Overhaul Of AOD - Trucks 5.2 Hr.
9116121 Replace Main Control Valve 1.3 Hr.
Body - Trucks
DEALER CODING
BASIC PART NO. CONDITION CODE
7A100 09
OASIS CODES: 501000, 502000, 504000