A/T - AOD Noise/Delayed Shifts/No Engagements

91ford04

Article No. 91-3-9


^ TRANSMISSION - AOD - BURNT FLUID, OVERDRIVE BAND OR FORWARD CLUTCH PLATES


^ TRANSMISSION - AOD - NOISE, DELAYED SHIFTS OR NO ENGAGEMENTS


FORD: 1990 CROWN VICTORIA, MUSTANG, THUNDERBIRD


LINCOLN-MERCURY: 1990 COUGAR, GRAND MARQUIS, MARK VII, TOWN CAR


LIGHT TRUCK: 1990 BRONCO, E-150, F-150, F-250


This TSB article is being republished in its entirety to reflect changes in the labor time allowances for the Crown Victoria, Grand Marquis and Town Car.

ISSUE: Transmission noise, delayed shifts or no arrangements may be caused by an internal thrust washer that is abnormally worn. This wear results in virtually undetectable non-metallic particles that can plug the filter, creating fluid starvation. In addition, as observed during a transmission inspection or teardown, the fluid, overdrive band and/or forward clutch plates may be burnt.

ACTION: Perform the end play check on the converter and, if necessary, replace the converter, flush the cooler lines and replace the transmission filter. Refer to the following procedure for service details.

CONVERTER END PLAY, ONE-WAY CLUTCH CHECK

Perform the end play check on the converter.

Figure 1:

Figure 2:

1. Insert the End Play Checking Tool (T80L-7902-A) or equivalent into the converter pump drive hub until it bottoms, Figures 1 & 2.

2. Expand the sleeve in the turbine spline by tightening the threaded inner post until the tool is securely locked into the spline.

Figure 3:

3. Attach Dial Indicator (TOOL-4201-C) or equivalent to the tool. Position the indicator button on the converter pump drive hub and set the dial face at zero, Figure 3.


4. Lift the tool upward as far as it will go and note the indicator reading. The indicator reading is the total end play which the turbine and stator share.


5. Replace the converter unit if the total end play exceeds the limits indicated in the following Converter End Play Specifications Chart.


CONVERTER END PLAY SPECIFICATIONS


NEW OR
TRANSMISSION REBUILT USED

AOD .026 .050" Max.

6. Loosen the threaded inner post to free the tool and remove the tool from the converter.


CONVERTER REPLACEMENT & OTHER SERVICE REPAIRS


1. If the thrust washer is worn, the used condition allowable limit of .050" maximum will be exceeded.


2. If this occurs, replace the converter. Refer to the appropriate Car or Light Truck Shop Manual for service details and the Dealer Master Parts Catalog for correct parts usage.

3. To prevent repeat repairs...

^ Perform a thorough flushing of the cooler lines.

^ Replace the transmission filter (E1AZ-7A098-A).

^ Set the TV pressure with a pressure gauge as specified in the Car or Truck Shop Manual.

PART NUMBER PART NAME CLASS

E1AZ-7A098-A Transmission Filter AG


OTHER APPLICABLE ARTICLES: None


SUPERSEDES: 91-2-12


WARRANTY STATUS: Eligible Under Basic Warranty
Coverage, Powertrain
Warranty Coverage

OPERATION DESCRIPTION TIME

910309A Check End Play And Repair 7.7 Hr.
(includes overhaul) - Crown
Victoria, Grand Marquis

910309A Check End Play And Repair 7.8 Hr.
(includes overhaul) -
Econoline

910309A Check End Play And Repair 8.0 Hr.
(includes overhaul) - F
Series 4x2

910309A Check End Play And Repair 9.6 Hr.
(includes overhaul) - F
Series, Bronco 4x4

910309A Check End Play And Repair 8.4 Hr.
(includes overhaul) -
Mustang, Thunderbird,
Cougar, Mark VII

910309A Check End Play And Repair 8.1 Hr.
(includes overhaul) - Town
Car

DEALER CODING

BASIC PART NO. CONDITION CODE
7D014 87

OASIS CODES: 501000, 502000, 503000, 504000