![]() When this happens, your torque converter has a higher effective stall speed. This keeps your F150’s engine from turning at the right RPM for any given speed, which can really hurt fuel economy. If the torque converter has gone bad, then it’s no longer transferring power to your F150’s rear wheels in an efficient manner. This increases the fuel mileage achieved and brings an automatic transmissions efficiency more in line with a standard transmission. This eliminates operating inefficiency when it is at high speed (usually after about 45 miles an hour). A locking converter has clutches in it that lets the transmission make a physical connection with the engine. Nearly all modern automatic transmissions have a locking torque converter. More Info: F150 Transmission Slipping Diagnosis If you suspect this is happening with your car, has your fuel mileage changed? This is often a sign that the transmission isn’t operating efficiently. ![]() When a torque converter is malfunctioning it can cause this stall speed to change and feel like the transmission is slipping. The torque converter “stall speed” is the speed that the engine needs to be turning before the torque converter will begin engaging the transmission. Here are some of the most common bad torque converter symptoms that could happen to your F150. Symptoms of a bad torque converter include a vibration, too much RPM on the highway, and slipping. In the Ford F150, a bad torque converter is often caused by bad transmission fluid, worn clutches, bad seals, or loose bolts. Your Ford F150’s torque converter is responsible for converting the energy generated by the engine at the flywheel and transferring it to the transmission, creating a bridge between the engine and the transmission.
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