My mom's car. She was driving up to visit my kids. Her AT Oil Temp light began flashing. Looked it up to find that being an error code, I told her to continue on carefully. After about 20 miles, the light came on solid, indicating transmission overheating. So she pulled off and let it cool off. I read a P2764 code (Lock up solenoid low). She got a rental car, and will be leaving hers with me, so I'll do some diagnostics this weekend, but the symptoms fit that the converter wasn't locking, w