Recall - A/T A4LD Park Pawl Spring Replacement: Overview

TO:
All Ford Dealers February, 1992

SUBJECT:
Safety Recall 91S41 - Certain 1990 Ranger, 1990-1991 Aerostar and 1991 Explorer Trucks Equipped With A4LD Automatic Transmissions for Inspection and, if Necessary, Modification of the Vehicle's Park Mechanism


REFERENCE:
Mailgram, same subject, dated October 23, 1991

REASONS FOR RECALL
WARNING: The automatic transmission park mechanism in the vehicles sometimes may not prevent the vehicle from rolling even if the transmission shift lever is firmly placed in the "PARK" position.

WARNING:
IF A DRIVER PARKS THE VEHICLE WITHOUT SETTING THE PARKING BRAKE, IT COULD ROLL FREELY CREATING THE POSSIBILITY OF A CRASH OR PERSONAL INJURY.

The automatic transmission park mechanism sometimes may not hold the vehicle in a parked position. Parking on a slope such as a driveway, inclined parking lot or any non-level parking area without firmly setting the parking brake, may result in the vehicle freely rolling down the incline or slope without warning.

To correct this condition, dealers are to replace the park pawl spring in the transmission and install a spring on the transmission shift cable on each of the affected vehicles.

AFFECTED VEHICLES
Certain 1990 Ranger, 1990-1991 Aerostar and 1991 Explorer trucks equipped with A4LD automatic transmissions. Specific vehicle information is as follows:

Vehicle
Affected Assembly Production Dates
Vehicles Plant From Through
*
1990 Louisville 8/14/89 8/24/90
Ranger Twin Cities 8/14/89 8/24/90
*
1990-1991
Aerostar St. Louis 8/21/89 8/09/91

1991
Explorer Louisville 2/05/90 7/26/91


* Some 1989 model year transmissions were installed in early built 1990 Rangers and 1990 Aerostars. These vehicles DO NOT require the modification. The park pawl spring in the kit will not fit the 1989 model year park pawl and is not needed. Please check the transmission identification tag to determine the transmission model year.

ATTACHMENTS
Attachment I
- Administrative Information

Attachment II
- Labor Allowances
- Parts Ordering Information

Attachment III
- Technical Information