A code P0770 or P0773 may occur at higher mileages which indicates that the 3-way lock-up solenoid could be defective and may need replacement.
Average mileage: 196,000 (196,000–196,000)
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After I reset the code p 0770, it will come back on cuising @ around 55 miles. The truck seems to run normal but I had trans fluid over heating a few time while towing a boat.