The torque converter clutch solenoid locks the torque converter when the car is up to cruising speed. This is done to improve fuel economy. If the solenoid fails to operate, the car will still run, but with poor fuel economy. On the other hand, if it is stuck in the "locked" mode, the engine will stall out if the car is put in gear. The fault may not be in the solenoid, but in the electronics that control it.
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Sunday, March 8th, 2009 AT 4:21 PM