Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1987 Ford Bronco II 4WD V6-177 2.9LFACTORY OEM SERVICE PROCEDURE
A/T - A4LD Converter Channel Spring Addition
9214ford02
Article No.
92-5-12
February 26, 1992
TRANSMISSION - A4LD - ADDITION OF SPRING IN THE CONVERTER CHANNEL - TRANSMISSION BUILD CODE
DATES 8/21/91 AND LATER
FORD: 1992 and prior MUSTANG
LIGHT TRUCK: 1992 and prior AEROSTAR, EXPLORER, RANGER
ISSUE: A spring was installed in the transmission case worm trail to trap large machining chips and reduce engine stall complaints caused by the stuck converter lock-up valve in the main control of the transmission. This spring should not be installed in transmissions built prior to 8/21/91.
ACTION: If disassembly and assembly of the A4LD automatic transmission is required, make sure that the following service items are considered.
^ Transmissions built prior to 8/21/91 do not have a spring in the case channel and should not have one installed.
^ Transmissions built 8/21/91 and later should have the spring reinstalled if the transmission was disassembled.
^ Refer to the 1992 Ranger/Explorer/Aerostar Service Manual or the 1992 Mustang Service Manual, Section 07-01A, for service details.
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: INFORMATION ONLY
OASIS CODES: 501000, 502000, 504000
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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