How do you fix torque converter system in a ford expedition?

To fix a torque converter system in a Ford Expedition, start by diagnosing the issue, which may involve checking for fluid leaks, testing the Transmission Fluid level and condition, and using a scanner to read any error codes. If the torque converter is faulty, you'll need to remove the transmission, then replace or rebuild the torque converter as necessary. After reinstallation, ensure to refill the transmission fluid and check for proper operation. It's advisable to consult a professional mechanic if you're not experienced with transmission work.