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1998 Ford Taurus P0734 and P0761 Fault Codes: Overdrive Not Engaging & Repair Cost Concerns

Model: 1998 Taurus Fault Code: P0734 Posted: 2007-12-08 19:28

A 1998 Ford Taurus with a 3.0L automatic transmission is currently showing diagnostic trouble codes P0734 and P0760. The check engine light (MIL) is illuminated, and the vehicle runs and drives normally except for the absence of overdrive — it only shifts into lower gears. The car has approximately 80,000 miles and has received regular maintenance. Despite this, a local transmission shop has quoted $4,000 to repair the issue. Given that the vehicle is not experiencing severe performance issues, what are the most likely causes? Are there known service bulletins or common failure points for these specific codes in 1998 Taurus models?

Related fault codes
P0734P0761
Comments (4)
Anonymous 2007-12-09 12:57

P0734 indicates an incorrect gear ratio in fourth gear, while P0761 suggests a performance issue or stuck-off condition with shift solenoid C. Begin by inspecting wiring harnesses, electrical connections, voltage levels, and ground integrity. A faulty shift solenoid is also a common possibility. Additionally, verify whether the speedometer functions correctly — if it does not, this may point to an internal transmission sensor issue. Good luck; we recommend sharing updates after further diagnostics.

Anonymous 2007-12-10 09:40

The transmission range sensor is a known failure point on older Ford Taurus models and should be tested or replaced if faulty — especially in vehicles with high mileage and automatic transmissions.

Anonymous 2007-12-11 19:18

Thank you for the helpful insights. The owner will now take these recommendations to a different repair shop for thorough diagnostics. The first shop appeared to jump to a full transmission replacement without conducting proper testing or analysis, which is concerning given the vehicle's age and mileage.

Anonymous 2007-12-16 19:29

Ford issued Service Bulletin #98-10-7 specifically addressing P0734 and P0761 in 1998 Taurus models. The bulletin identifies a potential failure of the forward clutch control valve retainer, which may result in incorrect gear engagement. If the valve bore is intact, replacing the retainer with the revised design can resolve the issue — this repair requires removing the main control valve body and should be performed by a qualified technician.