I should also mention that the night the no lockup condition started, when I got home after driving it the 7 miles back, there was a long fluid trail and a puddle under my truck. 2 quarts were lost. The temperature outside was like 50 degrees. I do know that the trans gets extra hot when the converter isn't locking up. So I know it leaked cause of that, not the ambient air temp being too hot. So anyway, it hasn't leaked again since that night. I added back the 2 quarts it lost and It hasn't Leaked any back out. I have driven it maybe a total of 6 miles, that's only been short 1 mile drives to test if what I did fixed the problem though. So the seal is at least still working at low transmission temperatures.Code 62 does not mean transmission 4/3 circuit malfunction. It means that the converter is not locked when the PCM commands it to be locked.
If that is the only code you have it points to a mechanical problem, not an electrical problem. It could be a bad converter, a stuck torque converter clutch control valve (this valve is located in the pump body,) or a bad seal on the input shaft.