Transmission temp too high?..

[TwinTurboGTR]

It's hard to say. there are too many variable. The temp may be accurate and does sound high, but may be caused from the wrong fluid not keeping the temp right. The outside temp read doesn't really mean much. I am sure the infrared thermo was accurate, but being it measure the outside of the case, too many variable there too. But not too sure why there is such a discrepancy between going through OBD and INPA when it is using the same computer.

But from the problems you described, especially that delay in gears, that sounds like a fluid problem and not heat related.